metric_id,category,metric_name,value,unit,value_notes,source_organization,source_document,source_url,publication_date,data_recency_flag,axis_derived
1,AI Platform Scale,ChatGPT weekly active users,900000000,users,900 million,"OpenAI","OpenAI blog announcement","https://openai.com/blog/","2026-02-01","current",FALSE
2,AI Platform Scale,Google AI Overviews monthly users,1500000000,users,1.5 billion,"Google","Sundar Pichai Q4 2025 earnings call","https://abc.xyz/investor/","2026-02-04","current",FALSE
3,AI Platform Scale,Perplexity monthly active users,150000000,users,150 million+,"Perplexity AI","Company statement","https://www.perplexity.ai/","2026-01-01","current",FALSE
4,AI Platform Scale,Global AI users all platforms,1800000000,users,1.8 billion,"AILabs Audit","AI Search Market 2026 Report","https://ailabsaudit.com/blog/en/ai-search-market-2026-key-figures-market-share-trends","2026-04-01","current",FALSE
5,AI Platform Scale,ChatGPT annualized revenue,25000000000,USD,"$25B+ annualized","OpenAI","Company disclosure","https://openai.com/","2026-02-01","current",FALSE
6,AI Platform Scale,AI Overviews share of US Google queries – Conductor,25.1,percent,"21.9 million query analysis","Conductor","2026 Benchmarks","https://www.conductor.com/","2026-01-01","current",FALSE
7,AI Platform Scale,AI Overviews share of US Google queries – Semrush peak,30,percent,"September 2025","Semrush","Semrush blog tracking","https://www.semrush.com/blog/","2025-09-01","recent",FALSE
8,AI Search Market Share,ChatGPT referral share – Statcounter all channels,78.16,percent,"April 2026","Statcounter","Statcounter Global Stats","https://gs.statcounter.com/","2026-04-01","current",FALSE
9,AI Search Market Share,Anthropic Claude referral share – Statcounter,2.91,percent,"April 2026","Statcounter","Statcounter Global Stats","https://gs.statcounter.com/","2026-04-01","current",FALSE
10,AI Search Market Share,Google Gemini referral share – Statcounter,8.65,percent,"April 2026; passing Perplexity for first time","Statcounter","Statcounter Global Stats","https://gs.statcounter.com/","2026-04-01","current",FALSE
11,AI Search Market Share,ChatGPT B2B referral share Wave 1,89.1,percent,"May–Aug 2025; n=2802519 sessions; 41 brand sites","Goodie","AI Search Traffic Report 2026","https://higoodie.com/blog/ai-search-traffic-report-2026/","2025-10-01","recent",FALSE
12,AI Search Market Share,ChatGPT B2B referral share Wave 2,63,percent,"Jan–Apr 2026; 25.77B visits tracked","Goodie","AI Search Traffic Report 2026 Wave 2","https://higoodie.com/blog/ai-search-traffic-report-2026/","2026-05-01","current",FALSE
13,AI Search Market Share,Claude B2B referral share Wave 1,1.4,percent,"May–Aug 2025","Goodie","AI Search Traffic Report Wave 1","https://higoodie.com/blog/ai-search-traffic-report-2026/","2025-10-01","recent",FALSE
14,AI Search Market Share,Claude B2B referral share Wave 2,18.5,percent,"Jan–Apr 2026","Goodie","AI Search Traffic Report 2026 Wave 2","https://higoodie.com/blog/ai-search-traffic-report-2026/","2026-05-01","current",FALSE
15,AI Search Market Share,Gemini referral YoY growth Sep–Nov 2025,388,percent,"Similarweb data shared with Digiday","Similarweb / Digiday","In Graphic Detail: State of AI Referral Traffic 2025","https://digiday.com/media/in-graphic-detail-the-state-of-ai-referral-traffic-in-2025/","2025-12-22","recent",FALSE
16,CTR Impact,Pew: Click rate with AI Overview present,8,percent,"900 US adults; 68879 real searches; March 2025","Pew Research Center","How AI Summaries Affect Google Search Behavior","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/","2025-07-22","recent",FALSE
17,CTR Impact,Pew: Click rate without AI Overview,15,percent,"Same panel; same period","Pew Research Center","How AI Summaries Affect Google Search Behavior","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/","2025-07-22","recent",FALSE
18,CTR Impact,Pew: Relative CTR decline (AI Overview vs not),47,percent,"(8/15)-1; Axis Intelligence calculation","Pew Research Center / Axis Intelligence","Derived from Pew 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/","2025-07-22","recent",TRUE
19,CTR Impact,Pew: Sessions ending after AI Overview page,26,percent,"vs 16% without","Pew Research Center","How AI Summaries Affect Google Search Behavior","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/","2025-07-22","recent",FALSE
20,CTR Impact,Pew: Clicks on links within AI Overview,1,percent,"Very low engagement with cited links","Pew Research Center","How AI Summaries Affect Google Search Behavior","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/","2025-07-22","recent",FALSE
21,CTR Impact,Seer: Organic CTR on AIO queries – baseline,1.76,percent,"June 2024; 3119 keywords; 42 orgs; 25.1M impressions","Seer Interactive","AI Overviews CTR Longitudinal Analysis","https://www.seerinteractive.com/insights/ai-overviews-ctr/","2024-06-01","older — historical baseline",FALSE
22,CTR Impact,Seer: Organic CTR on AIO queries – trough,0.61,percent,"September 2025","Seer Interactive","AI Overviews CTR Longitudinal Analysis April 2026 update","https://www.seerinteractive.com/insights/ai-overviews-ctr/","2025-09-01","recent",FALSE
23,CTR Impact,Seer: Organic CTR on AIO queries – recovery,2.4,percent,"February 2026; Seer calls this leveling-off not recovery","Seer Interactive","AI Overviews CTR Longitudinal Analysis April 2026 update","https://www.seerinteractive.com/insights/ai-overviews-ctr/","2026-04-01","current",FALSE
24,CTR Impact,Seer: Organic CTR decline AIO baseline to trough,-61,percent,"1.76% to 0.61%","Seer Interactive","AI Overviews CTR Longitudinal Analysis","https://www.seerinteractive.com/insights/ai-overviews-ctr/","2025-09-01","recent",FALSE
25,CTR Impact,Seer: Paid CTR decline AIO baseline to trough,-68,percent,"19.70% to 6.34%","Seer Interactive","AI Overviews CTR Longitudinal Analysis","https://www.seerinteractive.com/insights/ai-overviews-ctr/","2025-09-01","recent",FALSE
26,CTR Impact,Ahrefs: CTR drop for position-1 rankings (AIO present) Feb 2026 update,-58,percent,"300000 keywords; Dec 2023 vs. Dec 2025; original Apr 2025 study showed -34.5%","Ahrefs","AI Overviews CTR Study Feb 2026 update","https://ahrefs.com/blog/ai-overviews-reduce-clicks-update/","2026-02-04","current",FALSE
27,CTR Impact,Amsive: Average CTR decline across AIO queries,-15.49,percent,"700000 keywords; 10 websites; 5 industries","Amsive Digital","AI Overviews CTR Analysis","https://www.amsive.com/","2025-01-01","recent",FALSE
28,Citation Advantage,Seer: Additional organic clicks for cited vs uncited brands,120,percent,"Same query; cited vs not cited","Seer Interactive","AI Overviews Citation Study 2026","https://www.seerinteractive.com/insights/ai-overviews-ctr/","2026-01-01","current",FALSE
29,Citation Advantage,Seer: Additional paid CTR halo for cited brands,91,percent,"Same query; cited vs not cited","Seer Interactive","AI Overviews Citation Study 2026","https://www.seerinteractive.com/insights/ai-overviews-ctr/","2026-01-01","current",FALSE
30,Citation Advantage,Share of AI Overview citations from pages in Google top 10,93.67,percent,,"Ahrefs","Ahrefs AI Overviews research","https://ahrefs.com/blog/ai-overviews-reduce-clicks-update/","2026-01-01","current",FALSE
31,Citation Advantage,.gov site share of AI Overview citations,6,percent,"vs 2% in standard results","Pew Research Center","How AI Summaries Affect Google Search Behavior","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/","2025-07-22","recent",FALSE
32,Citation Advantage,YouTube share of AI Overview citations,23.3,percent,"46M citation analysis","Surfer SEO","AI Overview Citation Analysis","https://surferseo.com/blog/","2025-12-01","recent",FALSE
33,Citation Advantage,Wikipedia share of AI Overview citations,18.4,percent,"Same analysis","Surfer SEO","AI Overview Citation Analysis","https://surferseo.com/blog/","2025-12-01","recent",FALSE
34,AI Referral Traffic,AI referral sessions YoY growth Jan–May 2025,527,percent,,"Search Engine Land","AI Referral Traffic Report","https://searchengineland.com/","2025-08-01","recent",FALSE
35,AI Referral Traffic,Total AI referral visits globally June 2025,1130000000,visits,"1.13 billion","Similarweb","Generative AI Statistics Report","https://www.similarweb.com/blog/marketing/geo/gen-ai-stats/","2025-08-01","recent",FALSE
36,AI Referral Traffic,AI referral YoY growth Jun 2024 to Jun 2025,357,percent,,"Similarweb","Generative AI Statistics Report","https://www.similarweb.com/blog/marketing/geo/gen-ai-stats/","2025-08-01","recent",FALSE
37,AI Referral Traffic,Adobe: AI traffic to US retail sites holiday 2025 YoY,693,percent,"Nov-Dec 2025; 1 trillion+ US retail visits","Adobe Digital Insights","AI-driven traffic surges across industries","https://business.adobe.com/blog/ai-driven-traffic-surges-across-industries","2026-01-12","current",FALSE
38,AI Referral Traffic,Adobe: AI traffic to US retail sites Q1 2026 YoY,393,percent,"Jan-Mar 2026","Adobe Digital Insights","AI traffic grows but retail sites lag","https://business.adobe.com/blog/ai-traffic-surge-retail-sites-not-machine-readable","2026-04-16","current",FALSE
39,AI Referral Traffic,Adobe: AI traffic travel sector holiday 2025 YoY,539,percent,,"Adobe Digital Insights","AI-driven traffic surges across industries","https://business.adobe.com/blog/ai-driven-traffic-surges-across-industries","2026-01-12","current",FALSE
40,AI Referral Traffic,Adobe: AI traffic financial services holiday 2025 YoY,266,percent,,"Adobe Digital Insights","AI-driven traffic surges across industries","https://business.adobe.com/blog/ai-driven-traffic-surges-across-industries","2026-01-12","current",FALSE
41,Conversion Quality,ChatGPT referral conversion rate,7.1,percent,"Second only to paid search (7.8%); ahead of organic social email display","Similarweb","Gen AI Stats 2026","https://www.similarweb.com/blog/marketing/geo/gen-ai-stats/","2026-05-01","current",FALSE
42,Conversion Quality,AI referral conversion rate – global ecommerce,11.4,percent,"vs 5.3% for organic","Similarweb","Via ALM Corp 2026","https://www.similarweb.com/","2026-01-01","current",FALSE
43,Conversion Quality,Ahrefs: AI visits share driving signups,0.5,percent,"0.5% of visits generated 12.1% of signups = 23x conversion","Ahrefs","AI vs Search Traffic Analysis","https://ahrefs.com/blog/","2025-12-01","recent",FALSE
44,Conversion Quality,Semrush: LLM visitors conversion advantage vs organic,4.4,times,"4.4x better conversion","Semrush","Semrush AI traffic analysis","https://www.semrush.com/blog/","2025-07-01","recent",FALSE
45,Conversion Quality,Adobe: AI traffic conversion advantage vs all non-AI – March 2026,42,percent,"Record level; previously AI converted worse","Adobe Digital Insights","AI traffic grows but retail sites lag","https://business.adobe.com/blog/ai-traffic-surge-retail-sites-not-machine-readable","2026-04-16","current",FALSE
46,Conversion Quality,Adobe: AI referrals bounce rate improvement vs non-AI,-33,percent,"33% less likely to bounce immediately","Adobe Digital Insights","AI-driven traffic surges across industries","https://business.adobe.com/blog/ai-driven-traffic-surges-across-industries","2026-01-12","current",FALSE
47,Conversion Quality,Adobe: Time on site improvement AI vs non-AI,45,percent,,"Adobe Digital Insights","AI-driven traffic surges across industries","https://business.adobe.com/blog/ai-driven-traffic-surges-across-industries","2026-01-12","current",FALSE
48,Conversion Quality,Adobe: Pages per visit AI vs non-AI,13,percent,,"Adobe Digital Insights","AI-driven traffic surges across industries","https://business.adobe.com/blog/ai-driven-traffic-surges-across-industries","2026-01-12","current",FALSE
49,GEO Content Tactics,Princeton: Quotation addition visibility lift,40.6,percent,"10000 queries GEO-bench; validated on Perplexity","Princeton / Georgia Tech / IIT Delhi / Allen Institute for AI","GEO: Generative Engine Optimization (ACM KDD 2024)","https://arxiv.org/abs/2311.09735","2024-06-28","older — foundational study; still primary reference",FALSE
50,GEO Content Tactics,Princeton: Statistics addition visibility lift,32.8,percent,"Same study","Princeton / Georgia Tech / IIT Delhi / Allen Institute for AI","GEO: Generative Engine Optimization (ACM KDD 2024)","https://arxiv.org/abs/2311.09735","2024-06-28","older — foundational study",FALSE
51,GEO Content Tactics,Princeton: Source citation visibility lift,29.7,percent,"Same study","Princeton / Georgia Tech / IIT Delhi / Allen Institute for AI","GEO: Generative Engine Optimization (ACM KDD 2024)","https://arxiv.org/abs/2311.09735","2024-06-28","older — foundational study",FALSE
52,GEO Content Tactics,Princeton: Fluency optimization visibility lift,27.6,percent,"Same study","Princeton / Georgia Tech / IIT Delhi / Allen Institute for AI","GEO: Generative Engine Optimization (ACM KDD 2024)","https://arxiv.org/abs/2311.09735","2024-06-28","older — foundational study",FALSE
53,GEO Content Tactics,Princeton: Authoritative voice visibility lift,25.3,percent,"Same study","Princeton / Georgia Tech / IIT Delhi / Allen Institute for AI","GEO: Generative Engine Optimization (ACM KDD 2024)","https://arxiv.org/abs/2311.09735","2024-06-28","older — foundational study",FALSE
54,GEO Content Tactics,Pages 20000+ chars: avg AI citations,10.18,citations per page,,"Growth Memo","Growth Memo March 2026 AI content analysis","https://www.growthmanifesto.com/blog/","2026-03-01","current",FALSE
55,GEO Content Tactics,Pages under 500 chars: avg AI citations,2.39,citations per page,,"Growth Memo","Growth Memo March 2026 AI content analysis","https://www.growthmanifesto.com/blog/","2026-03-01","current",FALSE
56,GEO Content Tactics,Citation multiplier long vs short content,4.3,times,"10.18 / 2.39; Axis Intelligence calculation","Growth Memo / Axis Intelligence","Derived from Growth Memo March 2026","https://www.growthmanifesto.com/blog/","2026-03-01","current",TRUE
57,GEO Content Tactics,ChatGPT citations following H1-H2-H3 hierarchy,68.7,percent,,"Foundation Marketing","Foundation Marketing GEO Analysis March 2026","https://foundationinc.co/","2026-03-01","current",FALSE
58,GEO Content Tactics,High domain authority sites (32K+ referring domains) citation advantage,3.5,times,"vs sites with ≤200 referring domains","SE Ranking","SE Ranking AI Citation Study","https://seranking.com/blog/","2025-11-01","recent",FALSE
59,GEO Content Tactics,ChatGPT answers pulling from live search (vs training data),88,percent,,"Ahrefs","Ahrefs April 2026","https://ahrefs.com/blog/","2026-04-01","current",FALSE
60,GEO Content Tactics,Pages retrieved by ChatGPT that it actually cites,50,percent,,"Ahrefs","Ahrefs April 2026","https://ahrefs.com/blog/","2026-04-01","current",FALSE
61,GEO Adoption,Marketers planning to optimize for AI search,92,percent,,"Conductor","Conductor 2026 Benchmarks","https://www.conductor.com/","2026-01-01","current",FALSE
62,GEO Adoption,Marketers currently measuring AI search performance,14,percent,"From same Conductor 2026 Benchmarks study","Conductor","Conductor 2026 Benchmarks","https://www.conductor.com/","2026-01-01","current",FALSE
63,GEO Adoption,GEO Readiness Gap Index (GRGI) – June 2026,657,index score,"(92/14)*100; original Axis Intelligence derived metric; first published June 4 2026","Axis Intelligence Research / Conductor (input data)","Axis Intelligence GEO Statistics 2026","https://axis-intelligence.com/geo-statistics/","2026-06-04","current",TRUE
64,GEO Adoption,CMOs planning to increase AEO/GEO investment 2026,94,percent,,"Conductor + BrightEdge","Cited in Writesonic 2026","https://www.brightedge.com/","2026-01-01","current",FALSE
65,GEO Adoption,AI Overview citation page turnover rate over 2-3 months,70,percent,,"Multiple analyses","Consistent finding across studies","","2025-12-01","recent",FALSE
66,GEO Market,GEO services market value 2025,848000000,USD,"$848 million","Dimension Market Research","Cited by Superlines AI Search Statistics 2026","https://www.superlines.io/articles/ai-search-statistics/","2025-12-01","recent",FALSE
67,GEO Market,GEO services market projected 2034,33700000000,USD,"$33.7 billion at 50.5% CAGR","Dimension Market Research","Cited by Superlines AI Search Statistics 2026","https://www.superlines.io/articles/ai-search-statistics/","2025-12-01","recent",FALSE
68,GEO Market,Traditional search volume decline projection by 2026,25,percent,"February 2024 projection; not yet updated by Gartner as of June 2026","Gartner","The Future of Search is Generative","https://www.gartner.com/en/newsroom/press-releases/2024-02-19-gartner-predicts-search-engine-volume-will-drop-25-percent-by-2026-due-to-ai-chatbots-and-other-virtual-agents","2024-02-01","older — 2024 projection",FALSE