Synthetic Query

Where do synthetic queries come from?

From the decomposition step Google calls query fan-out. Announcing AI Mode on 20 May 2025, Google described it as “breaking down your question into subtopics and issuing a multitude of queries simultaneously on your behalf”, and Search Central now describes AI Overviews the same way. Each of those issued searches is synthetic: nobody typed it, and it exists only inside that one answer.

They tend to carry qualifiers a person would leave implicit. Comparisons, price ranges, locations, the current year and words like “best” or “reviews” appear in generated searches far more consistently than in typed ones, because the engine is trying to cover an intent rather than express one. That is why keyword tools and answer engines disagree about what a topic contains. A tool reports what people typed; a fan-out reports what an engine decided the question implied, and the second list is longer, more commercial and mostly absent from any volume table.

Why can you not simply target them?

Because they are not stable and mostly not observable. The same prompt fans out differently between runs, and only some platforms return their searches at all: Perplexity exposes a search_queries field, and Google’s Gemini grounding API returns a google_search_call block. Everything else is inference from the answer text and the sources it cited.

So a tool showing you a tidy list of the sub-queries behind an answer is either reading a returned field or reconstructing them with a second model, and the difference between those two is the difference between evidence and a hypothesis. Ask which it is.

What should you do about a query space you cannot see?

Cover it rather than target it. Every adjacent question a page answers completely is a synthetic query it can match; every one it leaves out is a synthetic query answered by somebody else’s page inside the same response. That is an argument for a section per sub-intent, phrased as the question, and against a longer treatment of the head term.

There is one visible proxy worth using while the real thing stays hidden. People Also Ask shows a set of questions Google associates with a query, for free, on every results page, and while those are not the searches an AI Overview issued they are generated by the same association. Treat them as research rather than as the fan-out itself, and the distinction stays honest.

Related terms

• Query Fan-OutQuery fan-out is Google’s own term for how AI Overviews and AI Mode answer a question: the engine breaks the question into subtopics and issues many searches at once, then writes one answer from the results.
• Semantic SearchSemantic search retrieves results by meaning rather than by matching the words a searcher typed.
• Answer BlockAn answer block is a short passage near the top of a page that answers the page’s question completely and on its own.
• AI CitationAn AI citation is a link an AI assistant attaches to its answer, naming a page as a source.