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Glossary / Core concepts

Query fan-out

What is Query fan-out?

Query fan-out is the technique Google documents behind AI Overviews and AI Mode: one question is expanded into multiple related searches across subtopics and data sources, and the answer is assembled from all of them. Google states this surfaces a wider, more diverse set of helpful links than a classic search would.

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In practice

Why it matters for AI visibility

Fan-out quietly rewrites the rules of who can appear for a big query. Under classic search, the head term went to whoever ranked top for it, full stop. Under fan-out, a question like best accounting software for UK sole traders spawns sub-queries about pricing, Making Tax Digital, support and alternatives, and a page that genuinely nails one sub-question can be pulled into the answer without ranking for the head term at all. Google says as much: AI features can show a wider set of links than classic results. For smaller businesses this is one of the most concrete opportunities in AEO: stop fighting for the head term, and become the clearly best answer to the specific sub-questions the fan-out will generate. A focused, specific page can win a slice of an answer that its domain authority could never win outright.

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  • ChatGPT
  • Claude
  • Gemini
  • Perplexity
  • Google AI Overviews
  • Google AI Mode