GEO & AI Search Glossary
The Language
of AI Search
GEO comes with its own vocabulary. Here are clear, plain-language definitions of the terms that matter most.
- Generative Engine Optimization(GEO)
- Optimizing to be recommended and cited inside AI-generated answers, rather than ranked as a link.
- Answer Engine
- A system that responds to a query with a synthesized answer rather than a list of links (e.g., Perplexity, AI Overviews).
- Large Language Model(LLM)
- An AI model trained on large text corpora that generates human-like responses and underpins assistants like ChatGPT and Claude.
- Share of Answer
- How often, and how prominently, a brand appears in AI-generated answers for a defined set of prompts — the GEO analogue of share of voice.
- Entity
- A distinct, recognized thing (a company, person, product) that AI systems and knowledge graphs reason about. Strong entity recognition is foundational to GEO.
- Knowledge Graph
- A structured network of entities and their relationships used by search engines and AI to understand the world and disambiguate brands.
- Citation
- A reference an AI engine attributes a claim to. Being cited builds authority and drives qualified, high-intent traffic.
- Retrieval-Augmented Generation(RAG)
- A technique where an AI model retrieves relevant external documents at query time to ground its answer — making retrievable, structured content important.
- AI Overviews
- Google's AI-generated summaries that appear above traditional results, drawing on the web and Gemini.
- Grounding
- Anchoring an AI answer in verifiable sources. Well-structured, authoritative content is easier for models to ground in.
- Prompt
- The question or instruction a user gives an AI assistant. GEO begins by mapping the prompts your buyers actually use.
- LLM Optimization(LLMO)
- A near-synonym for GEO emphasizing the formatting and structuring of content so language models can parse, trust, and cite it.
- Structured Data
- Machine-readable markup (such as schema.org) that helps engines and models understand the meaning of your content.
- Hallucination
- When an AI model states something false or unsupported. Strong entity data and citations reduce the risk of a model misrepresenting your brand.
Ready to put these into practice? Read How to Rank in ChatGPT, Claude, Gemini & Perplexity.
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