# Glossary: GEO, SEO, ads, websites and AI > Short, plain definitions of GEO, AI Overviews, E-E-A-T, SEO, CTR, landing page, chatbot, AI agent, CRM and other terms, with examples and common mistakes. - URL: https://veilvex.com/blog/glossary/ - Page: English (en-US) · RU https://veilvex.com/ru/blog/glossary/ · AZ https://veilvex.com/az/blog/glossary/ · DE https://veilvex.com/de/blog/glossary/ - Veilvex: Veilvex (veilvex.com) is a team of specialists in GEO (visibility in AI answers), SEO, advertising, website and app development and AI-powered business automation; we work remotely with businesses in any country. Plain-language definitions of the terms you meet when you order a website, ads, SEO or an AI assistant. Each entry has an example and the mistakes people make most often. - **[AI agent](https://veilvex.com/blog/glossary/ai-agent/)** — An AI agent is a program built on a language model that does not just answer but acts: it plans steps and uses tools — a CRM, a calendar, email, a database — to complete a task on its own. - **[AI Overviews (Google)](https://veilvex.com/blog/glossary/ai-overviews/)** — AI Overviews are AI-generated summaries that Google shows at the top of some search results, with links to the pages the summary draws on. - **[AI visibility](https://veilvex.com/blog/glossary/ai-visibility/)** — AI visibility is how often and how accurately AI assistants such as ChatGPT, Gemini and Perplexity name a business when people ask them for a recommendation in its field. - **[API and integration](https://veilvex.com/blog/glossary/api-integration/)** — An API is a documented way for one program to exchange data with another; an integration uses APIs to connect services — a website, a CRM, payments, a messenger — so data moves between them automatically. - **[Chatbot](https://veilvex.com/blog/glossary/chatbot/)** — A chatbot is a program that talks with people in a messenger, on a website or in an app: it answers questions, takes orders or bookings and passes complex cases to a person. - **[CMS (content management system)](https://veilvex.com/blog/glossary/cms/)** — A CMS is software with an admin panel that lets you add and edit pages, texts, photos and prices on a website without writing code; WordPress is the best-known example. - **[Conversion rate](https://veilvex.com/blog/glossary/conversion-rate/)** — Conversion rate is the share of visitors who do the target action — send a request, call, buy — out of all visitors, usually shown as a percentage. - **[Core Web Vitals](https://veilvex.com/blog/glossary/core-web-vitals/)** — Core Web Vitals are Google’s three metrics of real user experience on a page: how fast the main content appears (LCP), how quickly the page reacts to input (INP) and how much the layout shifts while loading (CLS). - **[CPC (cost per click)](https://veilvex.com/blog/glossary/cpc/)** — CPC is how much an advertiser pays on average for one click on an ad; on most ad platforms it is set in an auction and changes with competition. - **[CPL (cost per lead)](https://veilvex.com/blog/glossary/cost-per-lead/)** — Cost per lead is the ad spend divided by the number of leads — requests, calls or sign-ups — the campaign brought in. - **[CRM (customer relationship management)](https://veilvex.com/blog/glossary/crm/)** — A CRM is a system that keeps all customers and deals in one place: contacts, requests, conversation history, stages of each deal and tasks for the team. - **[Cross-platform app](https://veilvex.com/blog/glossary/cross-platform-app/)** — A cross-platform app is a mobile app built from one codebase — for example with React Native or Flutter — that runs on both iOS and Android. - **[CTR (click-through rate)](https://veilvex.com/blog/glossary/ctr/)** — CTR is the share of people who click a link, an ad or a search result out of everyone who saw it: clicks divided by impressions. - **[Design system](https://veilvex.com/blog/glossary/design-system/)** — A design system is a shared set of reusable components — buttons, forms, cards — with rules for colours, type and spacing, so every new page or screen looks and works consistently. - **[E-E-A-T (experience, expertise, authoritativeness, trustworthiness)](https://veilvex.com/blog/glossary/e-e-a-t/)** — E-E-A-T is the set of qualities Google’s search quality guidelines use to judge content: experience, expertise, authoritativeness and trustworthiness, with trust the most important. - **[GEO (Generative Engine Optimization)](https://veilvex.com/blog/glossary/geo/)** — GEO is work on a website, its content and its mentions elsewhere so that AI assistants such as ChatGPT, Gemini and Perplexity understand a business correctly and can name it in their answers. - **[Landing page](https://veilvex.com/blog/glossary/landing-page/)** — A landing page is a single web page built around one offer and one action — usually a request, a call or a purchase — often used as the destination of an ad campaign. - **[LLM (large language model)](https://veilvex.com/blog/glossary/llm/)** — A large language model is an AI system trained on huge amounts of text that predicts and writes language; it powers ChatGPT, Gemini, Claude and most AI assistants and chatbots. - **[llms.txt](https://veilvex.com/blog/glossary/llms-txt/)** — llms.txt is a proposed plain-text file at the root of a website (/llms.txt) that gives AI tools a short, structured summary of the site and links to its key pages. - **[Responsive design](https://veilvex.com/blog/glossary/responsive-design/)** — Responsive design means a website adapts its layout to any screen — phone, tablet or desktop — so the same page stays readable and easy to use everywhere. - **[Retargeting (remarketing)](https://veilvex.com/blog/glossary/retargeting/)** — Retargeting is showing ads to people who have already interacted with a business — visited the site, watched a video, added to cart — to bring them back. - **[Schema markup (structured data)](https://veilvex.com/blog/glossary/schema-markup/)** — Schema markup is code added to a page, usually in JSON-LD format and using the schema.org vocabulary, that tells search engines and AI systems exactly what the page is about: an organization, a product, an article, an FAQ. - **[SEO (search engine optimization)](https://veilvex.com/blog/glossary/seo/)** — SEO is work on a website — its structure, speed, content and links — so that search engines like Google show it higher for the queries its customers type. - **[SERP (search engine results page)](https://veilvex.com/blog/glossary/serp/)** — A SERP is the page a search engine shows in response to a query: ads, the organic results and extra blocks such as maps, questions, images or AI-generated answers. - **[SMM (social media marketing)](https://veilvex.com/blog/glossary/smm/)** — SMM is the planned, regular running of a business’s social media to win customers: posts, short videos and replies. Agencies often charge USD 500–5,000 a month for a basic program (Sprout Social, 2026, mostly US rates), plus any ad budget. - **[UI/UX design](https://veilvex.com/blog/glossary/ui-ux/)** — UI (user interface) is what people see and tap: screens, buttons, text and colours. UX (user experience) is how easily they reach their goal through it. - **[Website audit](https://veilvex.com/blog/glossary/website-audit/)** — A website audit is a structured check of a site — speed, phone layout, search basics, technical errors and how easy it is to contact the business — that ends with a ranked list of fixes. Updated: 2026-11-05 --- WhatsApp +994 55 993 993 8 — https://wa.me/994559939938 · Telegram @veilvex_manager — https://t.me/veilvex_manager · Email info@veilvex.com — mailto:info@veilvex.com