Semantic Search
In one line
Semantic search matches results by understanding the meaning and intent behind a query rather than matching exact keywords — the default mode of modern search engines and LLMs.
Going deeper
Semantic search retrieves results by what a query means, not by which words it uses. A user who types 'how to charge my iPhone faster' gets the 'iPhone fast-charging guide' and the '20W charger recommendation' bundled together as the same intent. Once Google rolled out BERT and MUM, this became the default mode of mainstream search.
What it means for marketers is direct. The era of one page matching one exact keyword is over — what counts now is how deeply a page covers a theme. Pairing a primary keyword with its synonyms, adjacent concepts and likely follow-up questions, all woven into the prose naturally, is just baseline SEO craft today.
For GEO, semantic search isn't an adjacent topic — it's the core of the system. The embedding and vector retrieval an LLM uses to compose an answer is semantic search by another name, and Villion's emphasis on 'content AI is willing to cite' lines up exactly with the same principle: meaning has to be clearly organised on the page.
Related terms
Entity-Based SEO
Entity-based SEO organises content around entities — people, brands, products, concepts — rather than keywords, and works on the relationship signals between them.
LLMEmbedding
An embedding is a numeric vector representation of text or other data that preserves semantic meaning — the foundation of semantic search, vector databases and RAG.
GEO·AEOGEO
GEO (Generative Engine Optimization) is the practice of optimizing content and data so that a brand gets cited and recommended inside generative AI search answers like ChatGPT, Perplexity and Google AI Overviews.
SEOTopical Authority
Topical authority is the credit a domain earns when search engines decide it covers an entire subject area deeply and consistently — not just one or two posts.
SEOSearch Intent
Search intent is the underlying goal behind a query — typically grouped as informational, navigational, commercial or transactional — and matching it is what separates pages that rank from pages that don't.
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