finding,value,unit,base,dataset,period,notes
YouTube share of Google AI Overview citations,14.6,%,"3,597 citations in 723 AI Overviews",HasData Google AI Overview dataset (CC BY 4.0),2026,US desktop; 100 queries per intent type
Reddit share of Google AI Overview citations,4.9,%,"3,597 citations",HasData Google AI Overview dataset (CC BY 4.0),2026,
Community/UGC share of Google AI Overview citations,24.6,%,"3,597 citations",HasData Google AI Overview dataset (CC BY 4.0),2026,"YouTube, Reddit, Facebook, Quora, Instagram, LinkedIn and similar"
AI Overviews citing at least one YouTube video,72.2,%,723 AI Overviews,HasData Google AI Overview dataset (CC BY 4.0),2026,
YouTube AI Overview citations from videos outside organic top 10,57.3,%,536 YouTube citations,HasData organic panel (805 AI Overviews),2026,
Reddit AI Overview citations from threads outside organic top 10,10.6,%,199 Reddit citations,HasData organic panel (805 AI Overviews),2026,
Chance a position 1-3 page is cited in its query's AI Overview,55.5,%,805 AI Overviews with organic results,HasData organic panel,2026,
Chance a position 11-20 page is cited in its query's AI Overview,22.6,%,805 AI Overviews with organic results,HasData organic panel,2026,
AI Overview citations from pages outside the top 50,12.8,%,"3,776 citations",HasData organic panel,2026,
Community share of Gemini (API with Search grounding) citations,11.7,%,"40,796 citations",Search Arena (UC Berkeley / LMArena),Mar-May 2025,Different product and query set from 2026 AI Overviews
ChatGPT search citations to Wikipedia,9.5,%,"25,925 citations",Search Arena,Mar-May 2025,API version (GPT-4o search preview)
ChatGPT search citations to Reuters + AP,9.2,%,"25,925 citations",Search Arena,Mar-May 2025,API version
ChatGPT search citations to YouTube or Reddit,0.0,%,"25,925 citations",Search Arena,Mar-May 2025,API version
Perplexity citations to YouTube,7.8,%,"140,114 citations",Search Arena,Mar-May 2025,API version (Sonar)
Recommendation answers citing a best/top listicle URL,48.1,%,"2,918 English recommendation answers",Search Arena,Mar-May 2025,URL-pattern detection
Recommendation answers citing a review directory,2.2,%,"2,918 English recommendation answers",Search Arena,Mar-May 2025,"G2, Capterra, Clutch, Trustpilot, Yelp and similar"
Win rate of answer citing more sources (same provider),58.6,%,"1,476 decisive votes",Search Arena,Mar-May 2025,
Win rate of answer with more community sources (same provider),53.9,%,356 decisive votes,Search Arena,Mar-May 2025,Not statistically significant (p ~ 0.14)