Google’s AI visibility changes test UK-mandated search opt-out for publishers

Google has introduced a search opt-out control for publishers, as required by the UK Competition and Markets Authority (CMA), allowing them to exclude content from AI features. The control, launched globally, is bundled—publishers can’t opt out of individual features. Page-level controls are due by March 2027. Google must provide UK publishers with click data by December 3, but has not committed to sharing this data globally.

Publishers are waiting for this click data to decide whether to opt out, as current impression data does not show if AI features drive meaningful traffic. Industry leaders say the metric that matters is actual referrals, especially ahead of key sales periods like Black Friday. Google has made changes to AI Overviews, increasing link visibility and adding features to support publisher tracking, but the bundled controls make the opt-out decision complex.

Some publishers, such as The Economist Group, are still assessing the controls. The decision will depend on how much traffic Google sends and the visibility gained through AI features. There are concerns that opting out could reduce presence in prominent placements like Top Stories carousels.

Google’s strategy is to provide enough value through referral traffic to keep publishers engaged, while facing competition from rivals like OpenAI, which do not send traffic back to publishers.