Click-through rate (CTR)

What happens to clicks when an AI answers first?

They fall. The cleanest public measurement is Pew Research Center's. It tracked 68,879 Google searches made by 900 US adults in March 2025:

• Results with an AI summary

  Clicked a traditional result

  8% of visits

  Clicked a link inside the AI summary

  1% of visits

• Results without one

  Clicked a traditional result

  15% of visits

  Clicked a link inside the AI summary

  —

AI summaries appeared on 18% of those searches. Where they appeared, clicks on ordinary results nearly halved, and almost nobody clicked the summary's own links.

There is a second half to this that CTR cannot show. The answer at the top of this page, ChatGPT's reply on 3 October 2026 to "AI search visibility for marketing teams", read over the Attensira MCP, says it in the engine's own words: the goal is being included in the answer, not only the click. An answer read in ChatGPT or Perplexity is not an impression in Search Console and has no CTR. If you only watch CTR, the place your buyers increasingly read about you is invisible.

What is click-through rate?

Clicks divided by impressions. If a listing is shown 1,000 times and clicked 30 times, its CTR is 3 in a hundred. It answers one question: once people see this link, how often do they choose it?

In Google Search Console the terms are defined precisely:

• Impression: how often someone saw a link to your site on Google. In ordinary results it counts when the item is on the current page of results, whether or not it was scrolled into view. In carousels and expandable results the item usually has to be scrolled into view or expanded.
• Click: how often someone clicked a link from Google to your site. A click that stays inside Google is not a click.
• CTR: clicks divided by impressions, returned by the Search Analytics API as a value from 0 to 1.

The API returns at most 25,000 rows per request, 1,000 by default, and does not promise every row, only the top ones. Long-tail queries can go missing from exports for that reason alone.

Why does CTR fall when impressions rise?

Usually because the impression was earned on a surface that answers the question in place: an AI Overview, a featured snippet, a knowledge panel, a list of SERP features. The denominator counts exposure; the numerator counts departure. Any format that satisfies the reader without a visit lowers the ratio without anything on your page getting worse.

Google now separates some of this. Search Console includes AI feature traffic in its ordinary Web search totals, and since 31 August 2026 its generative AI report shows impressions for AI Overviews and AI Mode. A falling CTR next to rising AI Overview impressions is a zero-click pattern, not a broken title tag.

What can CTR not tell you?

• Anything outside Google. ChatGPT, Perplexity and Claude report no impressions to you. AI crawlers still read your pages: our pricing page drew 7,724 AI-crawler requests in the 30 days to 4 October 2026, from eight agents including ChatGPT-User and Claude-User, which fetch for a person, and training crawlers, which do not. No CTR report has a row for any of it.
• Whether you were named. An AI answer can mention you without a link, so there is nothing to click. That is a brand mention, and CTR has no column for it.
• Whether the answer was right. A high CTR on a page that AI answers misquote is still a problem.

What are the objections about CTR in AI search?

"Rewrite titles to recover CTR." If the drop comes from AI answering in place, a better title helps only the minority who still scroll. Measure where the impressions came from first.

"Low CTR means low quality." It can mean the question was answered before anyone needed to click. Read CTR per query type.

"AI traffic shows up in analytics as referrals, so we are covered." Only the clicks do. The many answers that used you without a click leave no trace in your analytics.

"Optimise for clicks from AI answers." The Pew numbers say those clicks are rare. Optimise to be named in the answer, and treat the click as a bonus.

How does Attensira measure what CTR misses?

Attensira keeps Search Console clicks, impressions and positions day by day beside what AI answers say about you: whether each answer names you, whether it links you, and which sources it leaned on, each with its sample size. Its crew then works on being named where people read, and ships each change after your approval. AI search performance shows what that report looks like on our own site, and crawler logs show which AI agents read which pages when no click is recorded.