Context
Google introduced experimental AI Mode and described a query fan-out approach that runs multiple related searches across subtopics and data sources.
What changed
A single user question could trigger a broader multi-query retrieval process before answer generation.
Why it matters
Visibility is no longer tied only to the user’s literal query; sources can be discovered through hidden subqueries and related retrieval paths.
Visibility OS interpretation
Query fan-out materially changes how practitioners should think about topical coverage and retrieval opportunity.
What remains uncertain
No event-specific uncertainty note is recorded yet. This record may change as new evidence is reviewed.