Study finds AI Overview traffic misattributed 22% of time
A nine-month GA4 tracking study of 51,200 clicks across 1,661 AI Overview-cited snippets found an average of 22.4% of that traffic was misattributed to the Direct channel instead of Organic Search — worst in May 2026 at 29.3%, best in April at 16.8% — per Search Engine Land. The same tracking, run by Elife Group’s Alex Galinos, found AI Overviews drove 7.53% of organic sessions overall, peaking at 16-17% of traffic in February-March 2026 before falling to 2-4% by August.
Why it matters: It puts a number on a known measurement blind spot — a meaningful share of AI Overview referral traffic is already landing on sites without showing up as AI-driven in standard analytics, understating the channel's real reach.
The record: Google AI OverviewsGoogle
Glossary: AI Overviews
Posted to the wire August 18, 2026.