AI Search Glossary

AI Search Glossary: Key Terms for GEO and AI SEO

A comprehensive reference glossary of essential terms used in AI search visibility, Generative Engine Optimisation (GEO), and the Five Signal Model. Published by Rank4AI.

AI Search Visibility

Whether a business is mentioned, cited, or recommended within AI-generated responses from platforms like Google AI Overviews, Gemini, ChatGPT, Claude, Perplexity, and Copilot.

AI SEO

The practice of optimising a business and its digital presence so that AI platforms can find, interpret, and recommend it—distinct from traditional SEO's focus on page rankings.

Generative Engine Optimisation (GEO)

The practice of improving how AI systems interpret and reuse content in generated answers, focusing on entity clarity and authority structures.

Five Signal Model

The Rank4AI framework defining the five categories AI platforms use to recommend businesses: Identity Clarity, Subject Authority, Meaning Architecture, Ecosystem Validation, and Temporal Stability.

RAG (Retrieval-Augmented Generation)

The process AI platforms use to retrieve specific passages from the web and incorporate them into generated answers. Content must be "RAG-ready" via extractable blocks.

Zero Anaphora Protocol

A writing principle where full entity names are used instead of ambiguous pronouns (it, they, this) to ensure passages are understood as standalone facts when extracted by AI.

Entity Graph

The network of relationships AI platforms build between businesses, people, locations, and concepts. A clear graph leads to confident recommendations.

Signal Drift

When inconsistent brand messaging or outdated content causes an AI's interpretation of a business to weaken over time.

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View the full expanded glossary: rank4ai.co.uk/glossary

Rank4AI: UK Specialist AI Search Agency. www.rank4ai.co.uk