What does "query fan-out" mean in the context of AI platforms?

Query fan-out" describes an AI's ability to broaden its search beyond the literal terms of a user's query. Instead of just looking for exact matches, it explores related concepts, synonyms, associated topics, and different perspectives that could contribute to a comprehensive answer. This allows the AI to provide more complete and nuanced responses, even if the initial query was narrowly phrased. The incorrect options describe different, unrelated concepts: exact phrase matching is too restrictive; fanning out results across multiple pages refers to presentation, not the search process; and distributing queries to multiple servers is an infrastructure detail, not a search methodology.