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Knowledge base
Glossary: marketing, AI and e-commerce terms explained
The terms you run into today in online marketing, AI search engines, SEO, GEO and e-commerce. Explained by ClickForest in clear language: short and factual.
In short
What will you find in this glossary?
One place where the most important terms from marketing, AI, SEO, GEO and e-commerce are explained clearly. No jargon for the sake of jargon, but short, factual definitions with context and a pointer to the relevant service or background.
Quick overview
- The most important marketing, AI, SEO, GEO and e-commerce terms in one place.
- Every term explained briefly and factually, in clear language.
- From GEO, POAS and zero-click to agentic commerce, MCP and server-side tracking.
- With pointers to the relevant ClickForest service or background article.
- Continuously expanded as the field evolves.
The starting point
What is the ClickForest glossary?
The ClickForest glossary is a continuously updated list of terms in which ClickForest, a digital growth agency from Bonheiden (Mechelen region), explains the most important terms from online marketing, AI, SEO, GEO and e-commerce in clear language for Flemish SMEs and scale-ups.
Every term gets a short, factual definition with context and, where relevant, a pointer to the related service or background article. That way you quickly find what a term means and why it matters for your growth.
Category
AI search engines and GEO
The terms around generative AI, AI search engines and becoming findable in a world where answers are increasingly composed by AI.
GEO Generative Engine Optimization
GEO is optimizing your content so that AI search engines like ChatGPT, Perplexity, Gemini and Google AI Overviews cite your brand in their answers. Where SEO aims for a position in the classic search results, GEO aims to be mentioned and quoted in the generated answer itself. ClickForest treats GEO as a separate layer on top of SEO. See the GEO service and the guide GEO strategies.
AEO Answer Engine Optimization
AEO is structuring content so that answer engines extract a direct, ready-made answer from it. AEO and GEO overlap heavily: AEO emphasizes the question-and-answer structure, GEO emphasizes being cited by generative AI.
LLM Large Language Model
An LLM is an AI model trained on huge amounts of text, which lets it understand and generate human language. ChatGPT, Claude, Gemini and Llama run on LLMs. They matter for marketing because more and more people use them to find products and services.
AI Overviews
AI Overviews are the AI-generated summaries that Google shows at the top of the search results, above the classic links. They answer the query directly, so users more often click no link at all (see zero-click search). For businesses the goal therefore shifts from ranking high to being mentioned in the AI answer itself.
Zero-click search
Zero-click search is a search where the user already gets the answer on the results page itself, without clicking through to a website. Featured snippets and AI Overviews amplify this behavior. For businesses it means visibility is increasingly decoupled from website traffic. More in the importance of zero-click.
Agentic commerce
Agentic commerce is online selling where an AI agent searches, compares and sometimes buys products on the user's behalf. Your webshop then has to be readable not only for people but also machine-readable for those agents. More in agentic commerce and your webshop.
RAG Retrieval-Augmented Generation
RAG is a technique where an AI model first retrieves relevant information from an external source and then uses it to generate an answer. This keeps a chatbot factual and current, instead of leaning only on its training data. RAG is the technique behind most business AI chatbots that answer based on your own company data.
Hallucination AI hallucination
A hallucination is an answer from an AI model that sounds fluent and convincing but is factually wrong or made up. The model predicts likely text, not verified truth. Techniques like RAG and grounding it in reliable sources limit the risk, but never remove it entirely.
MCP Model Context Protocol
The Model Context Protocol is an open standard that connects AI models to external systems and data in a uniform way, so they can read information and perform actions. It is often compared to a USB-C port for AI. See what is MCP.
AI agent
An AI agent is an AI system that autonomously performs tasks toward a goal: it reasons, uses tools and takes steps without you steering every action. In marketing and e-commerce, an agent can for example retrieve data, handle customer questions or automate processes. See the AI agents service.
Featured snippet
A featured snippet is the highlighted answer block that Google sometimes shows at the top of the search results, above the first organic link. Whoever appears there gains visibility, often without a click (see zero-click search). Clear, concise answers to a specific question increase your chances of it.
Chatbot
A chatbot is an automated conversation partner that answers visitors' questions via chat, increasingly powered by AI that uses your own business data (see RAG). Deployed well, it handles support and lead questions without human intervention. See the AI chatbot service.
Prompt engineering
Prompt engineering is the skill of giving AI models such clear, targeted instructions that they deliver usable and reliable output. A good prompt often determines more than the choice of model itself. More in prompt engineering for advanced users.
Vibe coding
Vibe coding is letting an AI write software based on what you describe in plain language, without reading or understanding the code yourself. The term comes from Andrej Karpathy and became Collins word of the year 2025. Ideal for prototypes, risky for production software without review. More in vibe coding and Claude Code.
Category
Online marketing and SEO
The core terms around visibility, advertising, conversion and measuring return.
SEO Search Engine Optimization
SEO, or search engine optimization, is the set of technical, content and authority-focused actions that make a website more findable in the organic results of search engines like Google. See the SEO service.
SEA Search Engine Advertising
SEA is paid advertising in search engines, where you pay per click to appear at the top of the results. Google Ads is the best-known platform. SEA delivers immediate traffic, while SEO works over the longer term. See performance marketing.
CRO Conversion Rate Optimization
CRO is systematically improving a website or webshop so that a larger share of visitors takes the desired action, such as a purchase or request. It starts from behavioral data, not gut feeling. See the CRO service.
POAS Profit on Ad Spend
POAS (Profit on Ad Spend) measures how much net profit one euro of ad budget generates. Unlike ROAS, which only measures revenue, POAS accounts for margins and costs. That way POAS steers on real profit instead of on revenue that can be loss-making. ClickForest steers performance campaigns on POAS. See performance marketing.
ROAS Return on Ad Spend
ROAS is the revenue you earn back per euro of ad budget. It is a popular but incomplete metric, because a high ROAS can still be loss-making if margins are low. Hence the shift toward POAS.
Core Web Vitals
Core Web Vitals are the metrics with which Google assesses a page's user experience: loading speed (LCP), interactivity (INP) and visual stability (CLS). They are a ranking factor and also influence conversion.
CPA Cost per Acquisition
CPA, or cost per acquisition, is what it costs you on average to acquire one customer or lead through advertising. Together with POAS and ROAS, CPA determines whether your advertising is profitable: a low CPA with sufficient margin means profitable growth. See performance marketing and lead generation.
Lead generation
Lead generation is attracting and collecting potential customers (leads) who show interest in your product or service, for example through a form, campaign or touchpoint. For B2B it is not about volume but quality: leads with real buying intent. See the lead generation service.
Keyword research
Keyword research is investigating which keywords and questions your audience searches for, with what volume and what search intent. It determines what you target your content and advertising at. More in the keyword research guide.
Backlink and link building
A backlink is a link from another website to yours; link building is deliberately building such links. They count as a vote of confidence and are an important authority factor for SEO, and increasingly for citations in AI answers too. See the SEO service.
E-E-A-T
E-E-A-T stands for Experience, Expertise, Authoritativeness and Trustworthiness: the criteria with which Google and more and more AI systems assess the reliability of content. A recognizable, expert author and verifiable sources increase your chances of ranking and being cited. See GEO and SEO.
Retargeting remarketing
Retargeting, or remarketing, is advertising again to people who already visited your website or webshop but have not yet bought. Because they already know your brand, these campaigns are often more profitable than cold reach. See performance marketing.
Marketing automation
Marketing automation is automating recurring marketing tasks and customer communication, such as email flows, lead follow-up and CRM updates, based on behavior and triggers. It saves time and ensures every lead gets the right message at the right moment. See the marketing automation service.
Category
E-commerce and Shopify
The terms that decide whether a webshop pays off: from platform and migration to the numbers behind growth.
Shopify
Shopify is a cloud platform that lets businesses build and manage a professional webshop without maintaining the technical infrastructure themselves. It combines hosting, payments, inventory and an app ecosystem in one subscription. See Shopify e-commerce.
Replatforming migration
Replatforming, or migration, is moving a webshop from one platform to another, for example from WooCommerce or Magento to Shopify. The challenge lies in preserving SEO value, URL redirects, data and tracking. See startup and migration.
Cart abandonment
Cart abandonment is the percentage of visitors who add products to the cart but do not complete the purchase. Common causes are unexpected shipping costs, a required account or a checkout that is too long.
Conversion rate
The conversion rate is the percentage of visitors who take a desired action, such as a purchase. You calculate it by dividing the number of conversions by the number of visitors. It is the core metric of every webshop and the starting point of CRO.
AOV Average Order Value
AOV, or average order value, is the average value of an order in your webshop. Raising the AOV, for example through cross-sells or bundles, grows your revenue without attracting extra traffic.
CLV Customer Lifetime Value
Customer Lifetime Value is the total net profit a customer generates on average over the entire duration of the relationship. Knowing the CLV tells you how much you can invest to acquire a customer and why retention matters so much.
Conversational commerce
Conversational commerce is selling and helping customers through conversation channels like WhatsApp, chat and messaging, instead of only through a classic webshop. Think product advice, cart recovery and follow-up in a one-on-one conversation. See WhatsApp for e-commerce.
Headless commerce
Headless commerce is a webshop architecture where the frontend, what the customer sees, is decoupled from the e-commerce backend and connected via an API. That gives more speed, flexibility and design freedom. See website development.
Shop Pay
Shop Pay is Shopify's accelerated checkout that remembers returning shoppers' details so they check out in one tap. Less friction in the final step usually means a higher conversion rate, especially on mobile.
Checkout extensibility
Checkout extensibility is the framework that lets you customise Shopify's checkout at fixed, safe points with apps and extensions, instead of freely programming it. It replaced the old checkout.liquid and is mainly available on Shopify Plus; the checkout itself stays largely standardised. See Shopify e-commerce.
Category
Data and tracking
The terms behind reliable measurement: the basis for every decision that rests on data instead of gut feeling.
GA4 Google Analytics 4
GA4 is the current version of Google Analytics, built around events instead of sessions and pageviews. It is the standard for measuring website traffic, behavior and conversions, with strong privacy and consent requirements. Correct GA4 measurement is the basis for steering on profit instead of gut feeling.
Server-side tracking
Server-side tracking moves the collection of measurement data from the browser to a server you manage yourself. That makes measurement more reliable and more robust against ad blockers and the disappearance of third-party cookies.
Consent Mode v2
Consent Mode v2 is the Google technology that adapts measurement and advertising behavior to the visitor's cookie preference. Since 2024 it has been required to send advertising data from European users to Google.
Structured data JSON-LD
Structured data is code you add to a page so that search engines and AI understand the content unambiguously: who the author is, what a product costs, which question is answered. JSON-LD is the format recommended by Google. It increases the chance of rich results and of being cited by AI. See implementing JSON-LD.
Attribution
Attribution is the way you assign conversions to the channels and touchpoints that contributed to them. It determines which campaigns a conversion is credited to, and therefore where your budget goes. Wrong attribution leads to wrong budget decisions.
First-party data
First-party data is data you collect directly from your own customers and visitors, with their consent: purchases, email addresses and behavior on your site. Now that third-party cookies are disappearing, it is becoming the most reliable basis for measurement and targeting (see server-side tracking).
FAQ
Frequently asked questions
SEO aims for a good position in Google's classic search results. GEO aims to be cited and mentioned in the answers of AI search engines like ChatGPT, Perplexity and Google AI Overviews. They reinforce each other: strong SEO foundations also help your GEO visibility, but GEO demands extra attention to structure, sources and machine readability.
ROAS measures revenue per euro of ad budget, POAS measures net profit per euro of ad budget. ROAS can be high while you are still making a loss, because it does not account for margins and costs. POAS gives a fairer picture of profitability and is therefore the metric ClickForest steers on.
With zero-click search, the user already gets the answer on the search page or in an AI summary, without clicking through to your website. Your visibility is then decoupled from your website traffic. Businesses that want to stay mentioned must build their content so that search engines and AI cite them as a reliable source.
SEA (Search Engine Advertising) is paid advertising in search engines: you pay per click to appear at the top, with immediate results. SEO is organically improving your findability, which builds more slowly but keeps paying off. ClickForest often deploys them together for Flemish SMEs: SEA for quick visibility, SEO and GEO for durable growth.
From term to growth
Turn a term into results?
You now know what the terms mean. Want to know what they can concretely deliver for your business? Book a no-obligation call with Frederiek Pascal.
