Digital Marketing Glossary

A link from another website pointing to yours. Backlinks from relevant, reputable sites act as a trust signal for both traditional search engines and AI systems, indicating that other sources consider your content worth referencing.

Why it matters: Search engines treat backlinks as votes of confidence — more (relevant, quality) votes generally means higher trust and rankings.

The "preferred" version of a page specified in HTML when the same or similar content is accessible via multiple URLs — for example, with and without tracking parameters. Canonical tags prevent duplicate-content confusion and consolidate authority signals onto a single URL.

Why it matters: Without it, search engines can split ranking credit across near-duplicate URLs instead of concentrating it on the one you actually want to rank.

How easily search engine and AI bots can access, read, and index the pages on a website. Issues like broken links, blocked resources, slow load times, or missing sitemaps can prevent otherwise great content from ever being seen — or cited.

Why it matters: If a bot can't crawl a page, no amount of great content or design on it matters — it simply doesn't exist as far as search or AI is concerned.

A third-party score (popularised by Moz, with equivalents from Ahrefs and Semrush) that estimates how likely a website is to rank, based mainly on the quality and quantity of its backlink profile. It's not a Google metric, but a widely used proxy for site authority.

Why it matters: It's a useful, if imperfect, way to benchmark your site's authority against competitors before investing in a link-building campaign.

Example: A DA of 15 competing against established players with a DA of 60 explains why the same content ranks very differently for each site.

A highlighted answer box shown above the normal organic results, pulled directly from a page's content — typically a definition, list, or table that directly answers the query.

Why it matters: Winning a featured snippet often means more visibility than the #1 organic result, and the same clear, structured formatting also improves your odds of an AI citation.

The process of finding the actual words and phrases people type into search engines when looking for a product, service, or answer — including how often they're searched and how competitive they are to rank for.

Why it matters: It stops you writing content around what you assume customers search for and replaces guesswork with evidence.

Example: Discovering that "website not working" gets 10x the searches of "website downtime" tells you exactly which phrase to use in your headline.

The deliberate, ongoing practice of earning backlinks — through digital PR, partnerships, guest content, and outreach — rather than waiting for them to happen by chance.

Why it matters: Organic backlinks are rare for most B2B and service businesses; a link-building programme is usually the only reliable way to build real domain authority.

Optimising a business's online presence — Google Business Profile, local citations, reviews, location pages — to rank in "near me" and city-specific searches and appear in the local map pack.

Why it matters: For any business that serves a physical area, local SEO is usually the highest-ROI channel available — the searcher is already ready to buy nearby.

The clickable headline (meta title) and short summary (meta description) that appear for a page in search results. Neither directly boosts rankings, but both strongly influence whether someone clicks through.

Why it matters: A page can rank #1 and still get ignored if the title and description don't convince the searcher it has their answer.

Example: Rewriting a generic title like "Services" to "Geyser Repairs Johannesburg — Same-Day Callout" typically lifts click-through rate noticeably without any ranking change.

Optimising the content and HTML of an individual page — headings, titles, image alt text, internal links, and how clearly it answers the query — so both users and search engines understand what it's about.

Why it matters: It's the cheapest, fastest SEO lever available: no new content or links required, just fixing what's already published.

The practice of improving a website's visibility in traditional search engine results pages through technical improvements, content quality, and authority signals like backlinks.

Why it matters: It's still the largest source of free, high-intent traffic for most businesses, and it's the foundation GEO builds on.

Example: A plumber's site ranking #2 for "geyser repair Johannesburg" gets found by people actively searching for that exact job — no ad spend required.

The page displayed after a user runs a search, containing organic listings, ads, AI Overviews, local packs, and other features. Understanding what occupies a SERP for your target queries shows where the real opportunities — including AI Overview placements — actually are.

Why it matters: A query's SERP tells you exactly what you're competing against — ads, a map pack, an AI Overview — before you invest in trying to rank for it.

The behind-the-scenes work that makes a website easy for search engines to crawl, render and index correctly — site speed, mobile-friendliness, clean code, working redirects, and a valid sitemap.

Why it matters: Brilliant content on a technically broken site often never gets seen — technical SEO is what lets the rest of your SEO work actually count.

A file listing every important URL on a website, submitted to search engines via tools like Google Search Console, so they can discover and prioritise pages efficiently rather than relying purely on following links.

Why it matters: On large or newer sites especially, a sitemap is often the difference between a page being indexed within days versus months.

A reference, link, or mention of a specific source within an AI-generated answer. Earning citations — being named or linked as the source for a fact or recommendation — is the primary success metric for GEO, similar to how rankings are the primary metric for traditional SEO.

Why it matters: A citation is the GEO equivalent of a #1 ranking — it's the concrete, trackable proof that AI systems consider your business a trustworthy source.

Google's AI-generated summary that appears above traditional search results for many queries, synthesising information from multiple sources into a single answer with citations. Appearing in an AI Overview — and being named as a source — is one of the clearest signals that a page is GEO-optimised.

Why it matters: AI Overviews now sit above the traditional results for a large share of searches, absorbing clicks that used to go to the #1 organic listing.

A closely related discipline focused on structuring content so it can be lifted directly as "the answer" by voice assistants, featured snippets, and AI chat interfaces — typically through clear question-and-answer formatting, concise definitions, and structured data. AEO and GEO overlap heavily; AEO is often considered an early predecessor of GEO.

Why it matters: AEO's formatting discipline — short, direct answers up front — is exactly what both featured snippets and AI assistants reward, so it pays off across channels at once.

A pillar page covering a broad topic, supported by a group of related articles that each address a specific sub-topic and link back to the pillar. This interlinked structure is one of the most effective ways to build topical authority — and a strong signal to AI systems that a site comprehensively covers a subject.

Why it matters: It's a concrete, repeatable structure for building topical authority — rather than a vague instruction to "publish more content".

Example: A pillar page on "GEO for South African SMEs" surrounded by 8-10 supporting articles on specific sub-topics, all linking back, forms one cluster.

Short for Experience, Expertise, Authoritativeness, and Trustworthiness — the framework Google's quality raters and algorithms use to assess content quality, especially for topics affecting health, finances or safety. Strong E-E-A-T signals, such as author bios, credentials, and reviews, help both search rankings and AI citation likelihood.

Why it matters: The same signals that satisfy Google's quality bar — real author credentials, verifiable claims, genuine reviews — are what convince an AI system your content is safe to cite.

Optimising how search engines and AI systems understand your business as a distinct, well-defined "entity" — a specific company, with a specific name, location and set of services — rather than just a collection of keyword-matched pages.

Why it matters: AI systems reason about entities, not keywords — a business that's clearly and consistently defined as one entity across the web is far easier for an AI to confidently recommend.

The practice of structuring content, data and digital signals so AI systems such as ChatGPT, Google AI Overviews, and Perplexity recognise a business as a credible source and cite it directly in generated answers — rather than only ranking it in a list of links. GEO requires specific, verifiable content, structured data, topical authority, and a consistent digital footprint.

Why it matters: As more buyers ask AI assistants for recommendations instead of typing keywords into Google, being cited (or not) directly shapes who gets considered at all.

When an AI system generates information that sounds plausible but is factually incorrect or fabricated, often because it lacks reliable source material on a topic. Businesses with thin or inconsistent online information are more likely to be misrepresented through hallucination.

Why it matters: If your business is thinly documented online, an AI assistant may confidently invent details about your pricing, services or location — and never tell the user it's guessing.

The information box — logo, description, hours, reviews, links — that Google displays alongside search results for a recognised entity, usually a business, person or brand. Knowledge Panels are compiled automatically from structured data, verified profiles and trusted sources.

Why it matters: Having a Knowledge Panel is a strong public signal that Google (and, by extension, AI systems drawing on the same data) recognises your business as a verified, real-world entity.

The type of AI model (e.g. GPT, Gemini, Claude) that powers chatbots and AI search assistants. LLMs are trained on vast amounts of text and generate responses by predicting the most likely next words — which is why factual accuracy and consistency across the web matter for being represented correctly.

Why it matters: Understanding that an LLM predicts plausible text (not looks facts up in a database) explains both why hallucination happens and why consistent, verifiable facts online reduce it.

The question or instruction a user types into an AI assistant — for example, "best accountants in Cape Town for small business". Understanding the real prompts your customers use, not just the search keywords they type into Google, is central to GEO content planning.

Why it matters: Prompts tend to be longer, more conversational and more specific than search keywords — content built only around keywords often misses them entirely.

A technique AI systems use to improve accuracy by retrieving relevant, up-to-date content from external sources — websites, documents, databases — before generating a response, rather than relying only on what the model memorised during training. RAG is why fresh, well-structured content increases citation chances.

Why it matters: It's the mechanism behind most AI Overviews and chat-with-search features — content the retrieval step can actually find and parse is the content that gets cited.

Standardised code — typically JSON-LD, based on the schema.org vocabulary — added to a webpage that explicitly tells search engines and AI systems what the content means: this is a FAQ, this is a review, this is a local business with these opening hours. Structured data is one of the highest-leverage GEO investments because it removes ambiguity for machines.

Why it matters: It translates your content into a format machines can parse with certainty instead of guessing — often the single highest-leverage technical change available.

A combined discipline that treats traditional SEO, generative-AI optimisation (GEO), and local search as one integrated strategy rather than three separate projects — because the same underlying signals (structured data, reviews, consistent facts) feed all three.

Why it matters: Running SEO, GEO and local as separate, uncoordinated efforts wastes budget rebuilding the same foundations three times.

The degree to which a website is recognised as a comprehensive, trustworthy source on a specific subject, built by publishing depth of interlinked content rather than isolated pages. AI systems favour sources with demonstrated topical authority when selecting what to cite.

Why it matters: One deeply covered subject beats ten shallow ones — both search engines and AI systems reward genuine depth over scattered breadth.

A search where the user gets their answer directly from the results page — via an AI Overview, featured snippet, or knowledge panel — without clicking through to any website. Zero-click searches are increasing, which is why being cited as the source matters more than ever, even without a click.

Why it matters: Traffic-based reporting alone increasingly understates your real visibility — a cited-but-not-clicked mention still builds brand awareness and trust.

The formula Google Ads uses to decide an ad's position on the page and whether it shows at all — combining your bid amount with Quality Score and expected impact of ad formats/extensions.

Why it matters: It explains why a competitor with a lower bid can outrank you: a strong Quality Score can beat a bigger budget.

A server-side tracking method — used by Meta, Google, and others — that sends conversion data directly from a business's server to the ad platform, bypassing browser-based limitations like ad blockers and cookie restrictions. CAPI significantly improves the accuracy of ad attribution.

Why it matters: Without it, browser privacy changes mean a growing share of real conversions simply never get reported back to the ad platform — making campaigns look worse than they are.

The average amount you pay each time someone clicks your ad, calculated as total spend divided by total clicks.

Why it matters: It's the base unit of paid media cost — everything else (budget planning, target CPA, ROAS) is built on top of it.

Example: Spending R2,000 on ads that generate 250 clicks gives an average CPC of R8.

Search terms you explicitly exclude from triggering your ads, to stop wasting budget on clicks that will never convert.

Why it matters: Without a negative keyword list, budget quietly leaks to irrelevant searches — often 20-30% of spend on an unmanaged account.

Example: A business selling premium kitchens adds "cheap" and "diy" as negative keywords so their ad doesn't show for "cheap diy kitchen cabinets".

A single Google Ads campaign type that automatically serves ads across Search, Display, YouTube, Gmail and Maps from one campaign, letting Google's algorithm decide where and to whom to show each ad based on your goal.

Why it matters: It gives access to inventory and combinations a human couldn't manage manually, at the cost of less granular control — a trade-off worth understanding before switching to it.

An advertising model where you pay each time someone clicks your ad, rather than paying for the ad to simply be shown. Google Ads and Meta Ads are the two largest PPC platforms.

Why it matters: Unlike traditional media, PPC only charges for genuine interest (a click), and results are visible from day one rather than after months of SEO work.

Example: An ad shown 1,000 times that gets 40 clicks at R6 each costs R240 for that day, regardless of how many people simply saw it without clicking.

Google's 1-10 rating of an ad's expected relevance and usefulness, based on click-through rate, ad relevance, and landing page experience. It directly affects both your cost per click and your ad position.

Why it matters: A higher Quality Score means paying less for the same ad position — it rewards genuinely relevant ads and landing pages, not just bigger budgets.

Showing ads specifically to people who have already visited your site or engaged with your brand, rather than to a cold audience — typically at a much lower cost per conversion than first-touch advertising.

Why it matters: Most visitors don't convert on their first visit; retargeting is how you stay in front of them until they're ready.

Google's machine-learning-driven bidding strategies (Target CPA, Target ROAS, Maximize Conversions) that automatically adjust bids in real time based on the likelihood a given auction will convert, rather than a human setting a fixed bid.

Why it matters: It reacts to signals a person can't track manually — time of day, device, location, past behaviour — usually outperforming manual bidding once there's enough conversion data.

A small piece of code placed on a website that records visitor actions — page views, purchases, form submissions — and sends that data back to an advertising platform, enabling retargeting and conversion measurement. Browser privacy changes have made pixel-only tracking less reliable, which is why pairing pixels with server-side tracking (CAPI) is now standard.

Why it matters: It's what makes retargeting possible in the first place — without a pixel, an ad platform has no way to know who's already visited your site.

Recording when a specific, valuable action happens — a form submission, a purchase, a booked call — and connecting it back to the marketing channel and campaign that drove it.

Why it matters: Traffic numbers alone don't pay the bills — conversion tracking is what turns marketing from a cost centre into a measurable investment.

A set of Google metrics measuring real-world page experience: loading speed (LCP), interactivity (INP), and visual stability (CLS). Strong Core Web Vitals scores support both search rankings and crawlability, since slow or unstable pages are harder for bots to process reliably.

Why it matters: Beyond the ranking impact, poor Core Web Vitals directly cost conversions — visitors abandon slow, jumpy pages before they ever see your offer.

Recording specific user actions on a website — button clicks, video plays, form starts, scroll depth — as discrete data points, rather than only measuring which pages were viewed.

Why it matters: Page views alone can't tell you whether someone actually engaged with your pricing table or just landed and left — events fill that gap.

Google's current website analytics platform, which tracks visitor behaviour, traffic sources, conversions, and engagement using an event-based data model. GA4 data helps measure whether GEO and SEO efforts are translating into real traffic and leads.

Why it matters: It's usually the single source of truth for whether marketing activity is actually turning into visits, leads and revenue — not just visibility.

A free Google tool that shows how a website performs in Google Search — including which queries it appears for, click-through rates, indexing issues, and increasingly, AI Overview appearance data. It's an essential diagnostic tool for both SEO and GEO.

Why it matters: It's the only place that shows you the exact queries your site already ranks for — a direct window into real search demand for your business.

A free tool for deploying and managing all your tracking code — GA4, ad pixels, conversion tags — from one interface, without needing a developer to edit the website's code every time a tag changes.

Why it matters: It turns tracking changes from a developer ticket into a five-minute task, which is usually the difference between tracking staying accurate and slowly rotting.

A visual overlay (via tools like Hotjar or Microsoft Clarity) showing where visitors click, move their mouse, and how far they scroll on a page — turning behaviour into a picture rather than a spreadsheet.

Why it matters: It's often the fastest way to spot why a page isn't converting — e.g. everyone scrolling straight past your call-to-action.

A single visit to a website, covering everything a user does within it until 30 minutes of inactivity (or a new day) starts a new one. It's the basic unit most web analytics is built around.

Why it matters: Understanding what counts as one session (versus one user) prevents misreading traffic reports — one person browsing for an hour can generate multiple sessions.

Tags added to the end of a URL — for example ?utm_source=newsletter&utm_medium=email — that tell analytics tools exactly where traffic came from. Consistent UTM tagging is essential for accurately attributing leads and revenue to specific campaigns.

Why it matters: Without consistent tagging, traffic from real campaigns quietly gets misclassified as generic "direct" or "referral" traffic, and campaign ROI becomes unmeasurable.

The consistent personality, tone and word choices a business uses across all its content and channels — direct versus friendly, technical versus plain, formal versus casual.

Why it matters: A recognisable, consistent voice builds trust over repeated exposure; inconsistent tone across channels quietly undermines it.

Creating and distributing genuinely useful content — articles, guides, videos — to attract and build trust with an audience, rather than directly pitching products or services.

Why it matters: It's the fuel behind SEO, GEO and social growth simultaneously — none of those channels work without something worth ranking, citing or sharing.

Writing text specifically intended to persuade someone to take an action — buy, sign up, book a call — as distinct from general content writing, which is often more informational.

Why it matters: The same product described in generic versus persuasive copy can convert at wildly different rates on identical traffic.

The specific instruction telling a reader or viewer what to do next — "Book a free consultation", "Download the guide" — usually presented as a button or clear closing line.

Why it matters: Content without a clear next step leaves interested readers with nowhere to go — a weak or missing CTA is one of the most common, easily fixed conversion leaks.

A planned schedule of what content gets published, where, and when — across blog, social and email — so publishing is consistent and coordinated rather than reactive.

Why it matters: Consistency compounds; a content plan published sporadically for a year builds far less authority than the same volume published on a steady schedule.

The percentage of people who interact (like, comment, share, click) with a piece of content out of everyone who saw it.

Why it matters: It's a better health check than follower count alone — a smaller, genuinely engaged audience usually outperforms a large, passive one.

Example: A post reaching 5,000 people with 150 interactions has a 3% engagement rate.

Content that stays useful and accurate for years without needing frequent updates — a "how it works" guide rather than a news item tied to a specific date.

Why it matters: It compounds in value over time, continuing to attract traffic and citations long after publication, unlike time-sensitive content that decays fast.

The ongoing work of planning, creating, publishing and responding across a business's social media accounts — distinct from paid social advertising, though the two often work together.

Why it matters: Consistent, responsive social presence builds the kind of visible trust signal that both potential customers and AI systems assessing your credibility pick up on.

Content that shares original opinions, data or expertise on industry topics, positioning the author (or business) as a credible expert rather than just a vendor.

Why it matters: It's one of the most direct ways to build the "expertise" and "authoritativeness" signals that both human buyers and AI citation systems look for.

Content — reviews, photos, testimonials, social posts — created by customers rather than the business itself.

Why it matters: It's inherently more trusted than brand-produced content, and it's exactly the kind of independent, third-party signal both buyers and AI trust assessments weigh heavily.

A permanent redirect that automatically sends visitors and search engines from an old URL to a new one, passing along most of the original page's accumulated ranking authority.

Why it matters: Done correctly during a site migration or URL change, it preserves years of built-up SEO value; done incorrectly (or skipped), that value is simply lost.

A defined way for two pieces of software to exchange data automatically — for example, a website's booking form sending a new lead straight into a CRM without manual entry.

Why it matters: APIs are what let separate marketing, CRM and analytics tools work together as one system instead of requiring manual data transfer between them.

A network of servers distributed globally that serves website files from the location physically closest to each visitor, instead of from one central server.

Why it matters: For a South African business with international customers or suppliers, a CDN can be the difference between a fast site everywhere and a slow one outside your home region.

Software (WordPress, Webflow, Shopify, etc.) that lets non-developers create, edit and publish website content through an interface, instead of editing code directly.

Why it matters: The right CMS choice determines how independently your team can update the site day-to-day versus needing a developer for every small change.

A CMS that manages content only, delivering it via an API to a separately built front-end — as opposed to a traditional CMS where content and design/templates are tightly bundled together.

Why it matters: It typically enables faster-loading sites and more design freedom, at the cost of needing a developer for most structural changes rather than a marketer alone.

Google's practice of using the mobile version of a website's content — not the desktop version — as the primary basis for indexing and ranking.

Why it matters: If content, links or speed are worse on mobile than desktop, that weaker mobile version is what actually determines your rankings.

How quickly a webpage loads and becomes usable, measured in seconds and via Core Web Vitals metrics like LCP.

Why it matters: Speed directly affects conversion rate, bounce rate and search rankings simultaneously — few technical fixes touch that many metrics at once.

Example: Improving load time from 5 seconds to 2 seconds typically produces a measurable, immediate lift in conversion rate on the same traffic.

A website layout that automatically adapts to fit any screen size — desktop, tablet, mobile — rather than requiring a separate mobile site.

Why it matters: With most traffic now arriving on mobile, a site that isn't genuinely responsive loses both visitors and search visibility.

The encryption certificate (SSL/TLS) that secures data between a visitor's browser and a website, shown as "https://" and a padlock icon in the address bar.

Why it matters: It's both a baseline trust signal for visitors and a confirmed, minor ranking factor — sites without it are actively flagged as "Not Secure" by browsers.

The rate at which existing clients cancel or don't renew, over a given period.

Why it matters: Because retaining an existing client is far cheaper than acquiring a new one, churn rate is often a more urgent number to fix than lead volume.

Example: Losing 2 of 20 retained clients in a quarter is a 10% quarterly churn rate.

The structured process of setting a new client up for success at the start of an engagement — access, goals, reporting expectations, first deliverables — before regular work begins.

Why it matters: A rushed or vague onboarding is one of the most common reasons client relationships sour early, regardless of how good the actual work later turns out to be.

A lead who has shown enough interest — downloading a guide, attending a webinar, repeat site visits — to be considered a good marketing-generated prospect, but hasn't yet been vetted as sales-ready.

Why it matters: Tracking MQLs separately from raw traffic or SQLs is what lets marketing and sales agree on where the handoff actually happens.

The overarching legal agreement between a business and a service provider covering terms that apply across all future work — payment terms, confidentiality, liability — so each new project only needs a short SOW rather than a full contract.

Why it matters: It speeds up starting new projects with an existing, trusted provider since the legal groundwork is already agreed once.

A fixed recurring monthly fee for ongoing services (typical for agencies), as opposed to a one-off project fee — usually covering an agreed scope of hours or deliverables each month.

Why it matters: It gives both sides predictable planning: the client budgets a known monthly cost, and the provider can resource the work consistently rather than in unpredictable bursts.

The set of active deals in progress, tracked by stage — from initial contact through proposal to close — used to forecast expected revenue.

Why it matters: A healthy pipeline is what turns "we got a lead" into a predictable, forecastable revenue number rather than a hopeful guess.

A document defining exactly what will be delivered on a specific project — scope, deliverables, timeline, and cost — sitting underneath the broader MSA.

Why it matters: It's the document that actually protects both parties from scope creep, by making "what's included" explicit rather than assumed.

A lead the sales team has vetted and confirmed has real budget, authority, and intent to buy — the stage after MQL, ready for direct sales follow-up.

Why it matters: The MQL-to-SQL conversion rate is one of the clearest signals of whether marketing is generating genuinely useful leads or just volume.

Upselling means getting an existing client to upgrade to a higher-value version of what they already have; cross-selling means selling them an additional, complementary service.

Why it matters: Growing revenue from existing clients is typically cheaper and faster than winning new ones from scratch.

A service delivered by one company but rebranded and resold under another company's name — common in agency subcontracting, where the end client never sees who actually did the work.

Why it matters: It lets agencies offer services outside their own specialty (e.g. a design agency reselling white-label SEO) without building that capability in-house.

The set of rules that determines how credit for a conversion is assigned across the multiple touchpoints — ads, organic search, AI citations, email — a customer interacts with before converting. Choosing the right attribution model affects which channels appear to be "working" and where budget gets allocated.

Why it matters: Get the model wrong and you can end up cutting budget from the channel that actually started the sale, just because it wasn't the last thing clicked.

The percentage of visitors who leave a page without any further interaction — no click, no scroll trigger, no second page view.

Why it matters: A high bounce rate on a page that should be persuading visitors to act is usually a clear sign something (speed, relevance, messaging) is broken.

The full cost of acquiring one new customer, including marketing spend and typically sales costs too — a broader figure than CPA, which usually covers marketing spend alone.

Why it matters: Comparing CAC to customer lifetime value (LTV) is the single clearest test of whether a business's growth engine is actually sustainable.

The percentage of visitors who complete a desired action — a purchase, form fill, booked call — out of total visitors.

Why it matters: It's the number that connects traffic to actual business results — doubling your conversion rate has the same revenue effect as doubling your traffic, at a fraction of the cost.

Example: A landing page with 500 visitors and 25 form submissions has a 5% conversion rate.

The average amount spent to acquire one customer or conversion through a specific channel or campaign, calculated as total spend divided by total conversions.

Why it matters: It's the number that tells you directly whether a campaign is profitable, once compared against what that customer is actually worth.

Example: Spending R10,000 on ads that produce 25 new customers gives a CPA of R400 per customer.

The practice of improving the percentage of website visitors who complete a desired action — such as submitting a form or making a purchase — through testing changes to layout, copy, and calls to action. CRO ensures that the extra visibility GEO and SEO generate actually converts into business results.

Why it matters: It's usually cheaper to convert more of your existing traffic than to buy or earn more traffic — CRO gets more value out of budget you've already spent.

The percentage of people who click a result after seeing it, calculated as clicks divided by impressions. A low CTR despite strong rankings often signals that a title or description isn't compelling — or that an AI Overview is answering the query before users reach the results.

Why it matters: It's the clearest signal of whether your message is actually grabbing attention, independent of ranking position.

Example: If 100 people see your ad and 5 click, your CTR is 5%.

The number of times an ad, post or search result was displayed on screen — regardless of whether anyone clicked or even consciously noticed it.

Why it matters: It measures reach, not response — a campaign can rack up huge impressions while still failing to generate any real interest, which is why it's always read alongside CTR.

The total revenue a business can expect from one customer over the entire length of the relationship, not just their first purchase.

Why it matters: A high CAC can still be profitable if LTV is high enough — this is why subscription and retainer businesses can justify spending more to win a client than a once-off retailer can.

Example: A client on a R5,000/month retainer who stays for 2 years has an LTV of R120,000, easily justifying a CAC of a few thousand rand.

Revenue generated for every unit of currency spent on advertising, calculated as revenue divided by ad spend, usually expressed as a ratio (e.g. 4:1) or percentage (400%).

Why it matters: It's the standard way ad platforms and agencies report e-commerce and lead-gen ad performance, since it directly links spend to revenue rather than just clicks or leads.

Example: R5,000 in ad spend that generates R20,000 in sales is a 4:1 ROAS.

The overall profit generated from an investment relative to its total cost, expressed as a percentage — broader than ROAS, since it typically includes all costs (not just ad spend) against all resulting profit (not just revenue).

Why it matters: It's the metric that ultimately matters to a business owner deciding whether to keep funding a channel, once every cost is accounted for.

Example: A R50,000 campaign that generates R150,000 in profit has a 200% ROI.