The crawler question for Google AI Overviews is Googlebot (AI Overviews use the main Search index). Blocking is a real option with a real cost, and the two directions are not symmetric. AI Overviews are generated above the classic results from pages in Google’s existing index, weighted toward sources that already rank for the query. They appear on a subset of queries and can vanish from a query entirely between one week and the next.
How Google AI Overviews actually decides
AI Overviews are generated above the classic results from pages in Google’s existing index, weighted toward sources that already rank for the query. They appear on a subset of queries and can vanish from a query entirely between one week and the next.
Its citations skew toward video and already-ranking pages, published analyses put YouTube at roughly 23.3% of AI Overview citations. In practice that means the surfaces worth auditing first are YouTube, top-ranking organic pages, structured data and FAQ markup, authoritative domains.
The method, in order
Know which agent does what: Googlebot (AI Overviews use the main Search index). Training access and answer-time retrieval are usually separate controls, and blocking the wrong one achieves the opposite of what was intended.
Decide what you are protecting. Blocking reduces the chance of being quoted without attribution; it also reduces the chance of being recommended at all.
Consider the asymmetry. Being absent from Google AI Overviews is easy to cause and slow to undo, even here, where retrieval is live, reputation lags access.
If you do block, block deliberately and document it, so a future traffic investigation does not spend a week rediscovering it.
Re-check after any robots.txt change that the agent you meant to allow is still allowed.
The honest caveat
Appearing in an AI Overview can reduce the clicks the same page used to earn, because the answer is now on the results page. Visibility and traffic move in opposite directions here more often than anywhere else.
Cituna checks Google AI Overviews daily alongside the other five engines, ChatGPT, Perplexity, Gemini, Claude, Grok and Google AI Overviews, on the $39 Starter, and pairs the result with Google Search Console so a change here can be tied to real clicks. We do not track Microsoft Copilot.
Drafted with AI assistance from our own research and Search Console data, and reviewed by Rahul A before publishing. Rules and prices change; check the linked official source before you act.