For two years the practical complaint from publishers was simple: appearing in a Google AI Overview meant your content could be summarised at the top of the page, with the click often staying inside Google. Until now, the only way to keep content out of those summaries was a blunt instrument — block crawling or use nosnippet markup — which also risked your presence in normal Search. The new Search Console setting separates the two questions for the first time. A site can stay fully ranked in organic results while removing itself from AI Overviews, AI Mode and AI Overviews in Discover.
The change did not come from a product decision. On 3 June 2026 the UK's Competition and Markets Authority issued a legally binding conduct requirement — the first under the country's Digital Markets, Competition and Consumers Act 2024 — ordering Google to give publishers a genuine opt-out from its AI search features. Google responded the same day by switching on a Search Console toggle for an initial subset of UK site owners, with wider rollout expected to follow. The control was visible from 3 June but unenforced; Google began acting on the signal on 17 June 2026.
What it does and does not cover
The opt-out removes a domain from three surfaces: AI Overviews in Search, the conversational AI Mode, and AI Overviews shown in Discover. Sites that opt out stop receiving traffic and impressions from those features but continue to appear in standard Search results and the normal Discover feed. Google has stated the setting is not used as a ranking signal, so the decision is genuinely about answer-surface presence rather than a trade against organic position.
Two limits matter. First, the control is domain-level today. Page-level grounding controls — the ability to exclude specific URLs rather than a whole site — are not available yet; under the CMA timeline the main publisher controls come into force by December 2026 and page-level controls by March 2027. Second, the setting does not reach the standalone Gemini app. A publisher who opts out of AI Overviews can still find its content used in Gemini answers, because that surface sits outside the Search products the toggle governs.
The decision is harder than it looks
The catch is information. Reporting on the launch notes that Google gave sites the opt-out before giving them the data to use it well: at rollout there was no clean, per-feature breakdown showing how much traffic AI Overviews specifically send or take, which makes an evidence-based opt-out difficult. Opting out is also all-or-nothing at the domain level for now, so a publisher cannot keep high-value explainer pages visible in AI answers while removing thin or sensitive ones. For most sites the honest position is that this is a reversible setting to evaluate deliberately, not a switch to flip the day enforcement begins.
Seen through an Answer Engine Optimization lens, the opt-out is less a tactic than a reframing. AEO has always argued that visibility in AI answers is probabilistic and earned through citable, well-structured, well-attributed content, not guaranteed. A domain-level opt-out is the opposite move — choosing absence — and it only makes sense for publishers whose business depends on the click rather than the citation. For most brands the more useful question is not whether to disappear from AI Overviews but whether they are structured to be cited accurately when they do appear, which is what a stable prompt-portfolio measurement programme is designed to answer.