glossary
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Brand mention (AI answer): what it is and what the evidence says
AVJ defines a mention as a brand or organization named in an AI answer’s text, with or without a link.
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Citation (AI answer): what it is and what the evidence says
AVJ defines a citation as a linked source URL attached to an AI answer, separate from a brand name appearing in its text.
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Grounding: what it is and what the evidence says
Google uses grounding to describe supplying retrieved information for an AI response, including content from its Search index at prompt time.
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Retrieval-augmented generation (RAG): what it is and what the evidence says
RAG combines a language model with retrieved information; Google documents its use of the technique to retrieve relevant pages for AI search responses.
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Query fan-out: what it is and what the evidence says
Google uses query fan-out to describe related searches generated while developing an AI response; its Search Console impression report does not expose those queries.
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AI Mode: what it is and what the evidence says
AI Mode is Google’s interactive AI search experience, with generated responses, supporting web links, and follow-up questions.
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AI Overviews: what they are and what the evidence says
AI Overviews are Google’s generated search summaries with supporting links; published click studies report associations, not a controlled estimate of their effect on traffic.
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AI visibility: what it is and what the evidence says
AVJ defines AI visibility through whether, how often, and how accurately a system names, describes, or cites a brand, organization, or website.
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Answer engine optimization (AEO): what it is and what the evidence says
Google describes AEO and GEO as terms for work focused on visibility in AI search, while treating that work as SEO within Google Search.
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Generative engine optimization (GEO): what it is and what the evidence says
GEO describes work intended to improve content visibility in generative AI answers; Google treats optimization for its own AI search features as SEO.