AI Search Statistics 2025: How AI Overviews Are Changing SEO

AI Overviews

How far Google AI Overviews have spread

Google's AI Overview feature generates a direct answer at the top of the results page before organic listings. Its presence on queries has grown sharply through 2025, with significant consequences for click-through rates.

60%

Of US Google searches show an AI Overview (late 2025)

The figure has grown from around 7% when AI Overviews launched in May 2024 to roughly 60% by late 2025. The rollout is ongoing.

Search Engine Land / Xponent21, 2025

72%

Month-on-month growth in AI Overview appearances (Feb-Mar 2025)

AI Overviews appeared in 13.14% of US desktop queries in March 2025, up 72% from February 2025 alone.

Datos / Search Engine Land, March 2025

75M

Google AI Mode users by December 2025

Google's full AI search mode reached 75 million users in December 2025, growing roughly 4x since its launch.

Google / SEMrush, December 2025

CTR impact

What happens to click rates when AI answers appear

This is the central issue for any business relying on organic traffic. Every study published so far reaches the same conclusion: AI Overviews reduce clicks to external websites. The question is by how much and for which queries.

61%

Drop in organic CTR when AI Overview is present

Based on analysis of 3,119 search terms and 25.1 million impressions. Informational and educational queries were most affected.

Seer Interactive, June 2024-September 2025

58%

Lower average CTR for top-ranking page when AIO present

Analysis of 300,000 keywords. The number-one ranking page loses more than half its normal click share when Google provides an AI answer above it.

Ahrefs, December 2025

68%

Drop in paid search CTR on AI Overview queries

Organic is not the only channel affected. Paid ads on the same queries also see substantially lower click rates when an AI Overview is present.

Seer Interactive, 2025

91%

More paid clicks for brands cited inside AI Overviews

Brands that appear as sources within the AI Overview earn 35% more organic clicks and 91% more paid clicks than brands that don't appear. Being cited changes the outcome.

Industry research, 2025

Every study finds a CTR decline. An analysis of 12 separate studies on AI Overview CTR impact found zero exceptions: all reported lower click rates when an AI Overview was present. The magnitude varied from 15% to 89% depending on query type and methodology. The consistent direction is not in dispute.

AI-generated content

How much of the web is now AI-written

74.2%

Of new web pages published in April 2025 contained AI-generated content

Based on Ahrefs' analysis of nearly one million pages. The majority of new content being published now involves AI in some form.

Ahrefs, 2025

17.3%

Of Google's top 20 results are fully AI-generated

Despite the volume of AI content being published, top-ranking pages still tend to be human-written or heavily edited. AI content at the top of results has grown but not dominated.

Originality.ai, September 2025

85%

Of content cited in AI Overviews was published in the last two years

Freshness is a meaningful signal for citation. Older content, however authoritative, is less likely to appear inside an AI Overview answer.

Seer Interactive, 2025

Traffic shift

Where search traffic is moving

527%

Year-over-year growth in AI referral traffic (Jan-May 2025)

Adobe tracked a 693% surge in traffic referred from AI tools during the same period. Traffic from AI assistants to websites is growing fast, from a small base.

Adobe; industry tracking, 2025

4.4x

Better conversion rate for LLM visitors vs organic

Visitors arriving from AI tools convert at 4.4 times the rate of organic search visitors. Lower volume, but the intent is higher.

SEMrush, July 2025

95%

Of Americans still use traditional search engines

Despite rapid AI search growth, the base hasn't abandoned Google. Total search usage (combining engines and AI tools) increased 26% worldwide. Both channels matter.

Graphite, 2026

2.5B

ChatGPT prompts processed per day

ChatGPT has 800 million weekly users as of mid-2025, now accounting for approximately 20% of search-related traffic worldwide.

Exploding Topics, August 2025

Schema and structure

What makes content get cited in AI answers

3.2x

More likely to appear in AI Overviews with FAQPage schema

Pages with properly implemented FAQPage structured data are 3.2 times more likely to be cited in a Google AI Overview.

Frase.io / structured data research, 2025

30%

Of websites use any schema markup at all

70% of websites have no structured data. That leaves the majority with no structured signal helping AI systems understand what the page is about.

Industry data, 2025

6.5x

More likely to be cited via third-party sources than own website

Brands are 6.5x more likely to appear in LLM answers through editorial mentions, reviews, and forum references than through their own domain. Off-site presence drives AI visibility.

Airops, October 2025

44.2%

Of LLM citations come from the first 30% of the text

AI models disproportionately draw from the beginning of an article. Front-loading key claims, stats, and conclusions improves the chance of being cited.

Growth Memo, February 2026

Perplexity vs ChatGPT citation behaviour: Perplexity cites sources in 92% of its answers, running a live web search for every query. ChatGPT performs a live search only 21% of the time, defaulting to training data for most responses. If you want to appear in AI answers, Perplexity rewards fresh, well-structured web content most consistently of the major AI tools.

For a full explanation of what AI Search Optimisation involves and how it differs from traditional SEO, see the ASEO page.