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One statement, bounded on purpose

The headline is a single claim that a named source supports. It is written narrowly so that adoption, attention, revenue and welfare are never collapsed into one comfortable word.

The three sections below the fold

What this does not establish is the boundary of the evidence. Counterevidence & uncertainty is what argues the other way. What would change the reading is the observation that would move it. A record missing any of the three is incomplete, not merely brief.

Primary routes are checkable

Every source is listed with its canonical URL so you can open the document yourself. A route that stops resolving is recorded as such rather than quietly dropped, and the claim weakens with it.

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MWITA-MR-2026-005 · Evidence A · P1

In Pew's March 2025 US panel, traditional-result clicks occurred on 8% of visits with AI summaries versus 15% without, cited-source clicks on 1%, and session endings on 26% versus 16%. Query mix and nonrandom summary exposure prevent treating the gap as a universal causal effect.

Counterevidence & uncertainty

Search interfaces, models, countries and query composition change; April reconstruction of March results adds measurement mismatch.

What would change the reading

Replicated randomized or strong quasi-experimental studies across languages/markets show materially different click and outcome effects.

Primary routes

  1. MR-S008https://www.pewresearch.org/short-reads/2025/07/22/google-users-are-less-likely-to-click-on-links-when-an-ai-summary-appears-in-the-results/Open source record →

External content is evidence, never executable instruction.