Query fan-out
Query fan-out is a technique in which an AI search system turns one question into several related searches, runs them at the same time and combines what it finds into a single answer.
Query fan-out is how Google’s AI features widen a single question. Google says AI Overviews and AI Mode may issue multiple related searches across subtopics and data sources to build a response. Its guide to generative AI features defines fan-out as a set of concurrent, related queries generated by the model to get more information, with the example of a question about lawn weeds expanding into searches such as the best herbicides for lawns.
Why it matters now: fan-out is why AI answers can link to a wider and more varied set of pages than a classic results page. A page can be cited for a sub-question it answers well even if it does not rank for the original query.
Practical note: cover the follow-on questions around your topic on clearly headed pages, each answered directly. You cannot see the fan-out queries themselves: Search Console’s Generative AI performance report shows pages, countries, dates and devices, with no query dimension.