sources
Every statistic we cite, dated and linked
KnewSearch sells measurement, so we hold our own marketing to a measurement standard. Every market statistic used on this site is listed here with its named source, its date, and a link. If we cannot source a claim, we do not make it.
68 percent of Google searches end without a click to any website (up from about 60 percent in 2024).
Rand Fishkin, SparkToro, using Similarweb US panel data, June 2026. https://sparktoro.com/blog/in-2026-less-than-one-third-of-google-searches-still-send-a-click/
Searches showing an AI Overview reach roughly 83 percent zero-click; searches inside Google AI Mode end without an external click 93 percent of the time.
Semrush AI Overviews study, September 2025. https://www.semrush.com/blog/semrush-ai-overviews-study/
AI Overviews reduce position-1 organic click-through by 58 percent.
Ahrefs, December 2025. https://ahrefs.com/blog/ai-overviews-reduce-clicks-update/
ChatGPT reached 900 million weekly active users.
OpenAI announcement, reported by TechCrunch, February 2026. https://techcrunch.com/2026/02/27/chatgpt-reaches-900m-weekly-active-users/
Google AI Mode surpassed 1 billion monthly users. (A separate, larger figure Google cites, 2.5 billion, refers to AI Overviews reach, not AI Mode.)
Google, Search at I/O 2026, May 2026. https://blog.google/products-and-platforms/products/search/search-io-2026/
Only about 1 percent of visits with an AI Overview result in a click on a source link inside the summary; users click a traditional result in 8 percent of searches with an AI summary versus 15 percent without one.
Pew Research Center, July 2025. https://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/
Brand web mentions are the strongest classic predictor of AI visibility (0.664 correlation), roughly 3 times stronger than backlinks (0.218), across a study of about 75,000 brands.
Ahrefs, 2026. https://ahrefs.com/blog/ai-brand-visibility-correlations/
84 percent of the links AI assistants cite are earned media; paid placements are a rounding error, across 25 million-plus citations from ChatGPT, Claude, and Gemini.
Muck Rack, What is AI reading?, May 2026. https://muckrack.com/blog/what-is-ai-reading-may-2026
Between 40 and 60 percent of the domains cited in AI answers change from month to month, measured across 240 million ChatGPT citations.
Profound, AI search volatility research, 2025-2026. https://www.tryprofound.com/blog/ai-search-volatility
Adding quotations, statistics, and cited sources lifts generative-engine visibility by up to about 40 percent, in the only peer-reviewed tactic study to date.
GEO: Generative Engine Optimization, Aggarwal et al., KDD 2024 (Princeton et al.), 2024. https://dl.acm.org/doi/10.1145/3637528.3671900
Google does not support llms.txt, and 97 percent of llms.txt files receive zero requests from AI bots, per a crawl of 137,210 domains.
Google statements (John Mueller) and Ahrefs crawl analysis, May 2026. https://ahrefs.com/blog/llmstxt-study/
Google's official guidance confirms AI Overviews and AI Mode are rooted in core Search systems; the fundamentals of ranking still apply.
Google Search Central, AI optimization guide, May 2026. https://developers.google.com/search/docs/fundamentals/ai-optimization-guide
Statistics describe the sources' findings at their publication dates; the market moves quickly and we update this page as studies are revised. Found a number here that has been superseded? Email hello@knewsearch.com and we will correct it.