AI OverviewGoogle's generative summary that appears above the classic blue links. Sources are cited but click-throughs drop 30–70%.Answer engineAny AI that returns a synthesized answer instead of a list of links - ChatGPT, Perplexity, Gemini, Claude, Copilot, Apple Intelligence.CitationA source an LLM references when composing its answer. Citation quality and diversity are the two biggest levers in GEO.DefinedTermSetSchema.org type used to structure a glossary so AI models can extract individual definitions as atomic facts.EntityA canonical, disambiguated concept in a knowledge graph - your business, a person, a product. AI reasons over entities, not keywords.Entity engineeringStructuring your business as an unambiguous entity across schema, knowledge graphs, and citations so LLMs treat it as fact.Generative Engine Optimization (GEO)The practice of making AI models mention your business by name when they generate answers to buyer questions.GroundingThe retrieval step where an LLM pulls fresh sources before answering. Being retrievable is the whole game.HallucinationWhen an LLM asserts something false with confidence. GEO minimizes this for your brand by feeding it clean, structured facts.Knowledge graphThe entity network an LLM reasons over. Google's KG, Wikidata, and vendor-specific graphs all feed answers.LLMLarge language model - the underlying architecture behind ChatGPT, Gemini, Claude, and every answer engine.llms.txtA `/llms.txt` file (like robots.txt) telling AI crawlers what your site offers and where to look. Emerging standard.PromptThe buyer's question. GEO tracking is prompt-level: 'best [service] in [city]' is one prompt, tracked monthly across models.Retrieval-Augmented Generation (RAG)The technique where an LLM retrieves sources at query time and generates an answer grounded in them.Schema.orgThe vocabulary AI models use to understand structured data on your site - Organization, Service, Product, FAQPage, etc.Share of Voice (SOV)Percentage of tracked prompts where your brand is named. The North Star GEO metric.SGE / AI OverviewsSearch Generative Experience (now AI Overviews) - Google's answer-engine layer above traditional results.Structured dataJSON-LD, Microdata, or RDFa markup on your pages that lets AI extract facts unambiguously.Zero-clickA search where the user gets their answer without clicking. AI answer engines are almost 100% zero-click by design.