What is "query fan-out" in AI search?

Query fan-out is a technique used by AI search engines to provide comprehensive answers. When a user submits a query, the AI doesn't just look for direct matches; it "fans out" to explore related concepts, entities, and contexts that might be relevant to the user's underlying intent. This allows the AI to synthesize information from various sources and present a more complete and nuanced answer, anticipating follow-up questions or related interests. It's not a spam filter (A) or a Google penalty (B), nor is it about organizing results alphabetically (D); it's a core mechanism for AI to understand and fulfill complex information needs.