AI Search & GEO Statistics 2026

This report pulls together current, sourced statistics on AI-powered search. Each figure is a self-contained, citable statement linked to its publisher; a full Sources list follows. It is the data companion to our AEO & GEO guide, which explains how to act on these trends.

1. AI search adoption is now mainstream

• Google AI Overviews reached 2 billion monthly users by mid-2025, up from 1.5 billion in May 2025, and are available in 200+ countries and territories (Google via TechCrunch, 2025).
• Google AI Mode passed 100 million monthly active users across the U.S. and India in its first months (Google via TechCrunch, 2025).
• ChatGPT crossed 800 million weekly active users in October 2025, roughly double the 400 million reported in February 2025 (OpenAI via TechCrunch, 2025).
• Two-thirds of LLM users say they use these tools "like search engines" for information retrieval, treating chatbots as substitute answer engines (Menlo Ventures, 2025).
• Generative AI tools exceeded expectations for two-thirds of users, with a third calling them "significantly better" than expected — a signal that AI-first discovery habits are sticky (Menlo Ventures, 2025).

2. How often AI Overviews show up in results

• AI Overviews appeared on roughly 16% of Google queries by November 2025, after spiking to 24.61% in July 2025 and starting the year at just 6.49% in January (Semrush, 2025).
• Over 88% of searches that trigger an AI Overview are informational in intent, so educational and how-to content is most exposed (Semrush, 2025).
• Over 68% of terms that trigger AI Overviews get 100 or fewer monthly searches, meaning the long tail — not just head terms — is where AI answers concentrate (Semrush, 2025).
• Science, Computers & Electronics, and People & Society are the most AI-Overview-saturated verticals, while Real Estate, Shopping, and Arts & Entertainment see them on under 3% of keywords (Semrush, 2025).
• The Semrush analysis spanned 10M+ keywords from January through November 2025, making it one of the largest public datasets on AI Overview prevalence (Semrush, 2025).

3. Zero-click and click-through impact

• Users click a traditional link only 8% of the time when an AI summary appears, versus 15% without one — nearly half the click-through (Pew Research, 2025).
• Only 1% of users click a link inside the AI summary itself, so being summarized without being clicked is now a real risk (Pew Research, 2025).
• 26% of searches with an AI summary ended the browsing session entirely, compared with 16% of searches without one (Pew Research, 2025).
• About 18% of all Google searches in the study produced an AI summary in March 2025, and 58% of participants saw at least one AI summary that month (Pew Research, 2025).
• Among the same keywords, zero-click rates actually edged down from 33.75% to 31.53% after an AI Overview appeared — evidence the picture is nuanced, not uniformly catastrophic (Semrush, 2025).

4. How AI engines pick which sources to cite

• Only about 38% of AI Overview citations come from pages ranking in Google's top 10 — down sharply from roughly 76% a year earlier (Ahrefs, 2026).
• Roughly 31% of citations come from pages ranking 11–100, and ~31% from pages beyond the top 100, so strong content can be cited without a top ranking (Ahrefs, 2026).
• The Ahrefs analysis covered 863,000 keyword SERPs and 4 million AI Overview URLs, attributing the shift partly to Google's "fan-out" sub-query process (Ahrefs, 2026).
• 18.2% of beyond-top-100 citations were YouTube URLs (about 5.6% of all AI Overview citations), underscoring that format diversity — not just web pages — drives citation (Ahrefs, 2026).
• After 16 months of AI Overviews, roughly half of citations still overlap with organic rankings — confirming traditional SEO and citation-readiness reinforce each other (BrightEdge, 2025).

5. What GEO/AEO actually moves (the evidence)

• GEO tactics can lift a page's visibility in AI answers by up to 40%, per the peer-reviewed study that coined the term "Generative Engine Optimization" (Princeton et al., KDD 2024).
• Adding statistics, quoting sources, and including citations were the most effective single changes, with statistics addition driving some of the largest visibility gains across engines (Princeton et al., KDD 2024).
• The GEO study tested six content modifications across 10 search engines using 10,000 queries, introducing impression, citation-recall, and citation-precision metrics (Princeton et al., KDD 2024).
• Nearly 70% of businesses report higher ROI from using AI in SEO, reflecting how quickly AI-assisted optimization has been adopted on the practitioner side (Semrush, 2024).
• AI search traffic rose 527% year-over-year in one Search Engine Land dataset, signalling that the channel — though still small — is compounding fast (Semrush, 2025).

6. Discovery, conversion, and the business opportunity

• Generative-AI traffic to U.S. retail sites jumped 1,200% between July 2024 and February 2025 as shoppers began using AI assistants to research and discover products (Adobe Analytics, 2025).
• AI-referred shoppers converted 31% more and browsed 8% more pages than visitors from other sources, indicating higher purchase intent (Adobe Analytics, 2025).
• AI-referred visitors bounced 23% less than the average, a sign that AI pre-qualifies intent before the click (Adobe Analytics, 2025).
• Perplexity processed roughly 780 million queries in May 2025, with the CEO reporting 20%+ month-over-month growth — a fast-growing answer engine to optimize for alongside Google and ChatGPT (Perplexity via Just Think AI, 2025).
• The shift toward citation-driven discovery means local and service businesses can be recommended by name inside AI answers — the GEO opportunity our GEO service is built around.

What this means for your business

The data points one direction: visibility is moving from "rank a page" to "be the cited source." Because AI engines now pull citations from well beyond the top 10, and because adding statistics and sources measurably raises citation odds, businesses that structure content for answers can earn AI visibility without waiting years for domain authority.

That is the work behind our AI SEO, Answer Engine Optimization (AEO), and Generative Engine Optimization (GEO) services. If you want the how-to, the AEO & GEO guide walks through the playbook, and you can benchmark where you stand today with our free AI Visibility Audit.

FAQs

How many people use AI search in 2026?

Google AI Overviews reach about 2 billion monthly users and Google AI Mode passed 100 million monthly users (Google, Q2 2025). ChatGPT crossed 800 million weekly active users in October 2025 (OpenAI). Perplexity handled roughly 780 million queries in May 2025, and Google Gemini reported about 400 million monthly active users in mid-2025. AI search is no longer a niche behaviour — it now sits alongside traditional search for billions of people.

Do AI Overviews reduce clicks to websites?

Yes, for most pages. Pew Research found that when a Google search shows an AI summary, users click a traditional result link only 8% of the time, versus 15% on searches without an AI summary — and only 1% of users click a link inside the AI summary itself (Pew Research, 2025). Sessions also end more often: 26% of searches with an AI summary ended the browsing session, versus 16% without.

How do AI engines decide which sources to cite?

They favour content that is retrievable, directly answers the question, and carries trust signals — not just pages that rank #1. Ahrefs found only about 38% of AI Overview citations come from pages in Google's top 10, down from roughly 76% a year earlier (Ahrefs, 2026). Princeton's GEO study showed that adding statistics, quotations, and cited sources can lift a page's visibility in AI answers by up to 40%.

Is GEO (Generative Engine Optimization) actually effective?

The peer-reviewed evidence says yes. The Princeton-led GEO study (KDD 2024) tested content changes across 10,000 queries and found that "Statistics Addition," "Cite Sources," and "Quotation Addition" were among the most effective tactics, boosting visibility in generative answers by roughly 30–40%. In short: write self-contained, factual, well-sourced passages and you become measurably more citable.

Does AI search traffic convert well?

It is a small but high-intent slice. AI referrals still make up well under 1% of total traffic for most sites, but it is growing fast and converting strongly — Adobe Analytics reported generative-AI traffic to U.S. retail sites jumped 1,200% between July 2024 and February 2025, with AI-referred shoppers converting better and bouncing less than other sources.

Sources

Every statistic above links inline to its source. The publishers cited, with year, are listed here for reference. Where a figure originates with a primary publisher (e.g. Google, OpenAI) but was reported via a secondary outlet, both are noted. Figures reflect the most recent data available as of May 2026 and are labelled by year.

1. Semrush — Semrush AI Overviews Study (2025).
2. Semrush — AI SEO Statistics (2024–2025).
3. Pew Research Center — Google users are less likely to click on links when an AI summary appears (2025).
4. Ahrefs — 38% of AI Overview citations come from the top 10 (2026).
5. Princeton University, Georgia Tech, Allen Institute for AI & IIT Delhi — GEO: Generative Engine Optimization (KDD 2024).
6. OpenAI (via TechCrunch) — ChatGPT hits 800M weekly active users (2025).
7. Google (via TechCrunch) — AI Overviews have 2B monthly users; AI Mode 100M (2025).
8. Menlo Ventures — 2025: The State of Consumer AI (2025).
9. Adobe Analytics — Generative-AI traffic to U.S. retail sites jumps 1,200% (2025).
10. BrightEdge — Rank overlap after 16 months of AI Overviews (2025).
11. Perplexity (via Just Think AI) — Perplexity's 780M monthly queries (2025).