AI Referral Traffic

AI referral traffic refers to visits to your website coming from clicks on sources cited in AI engine responses like ChatGPT, Perplexity, Google AI Overviews and Claude.

How to measure it in GA4

AI traffic is traceable in Google Analytics 4 by creating segments based on AI referrers: chat.openai.com, perplexity.ai, google.com (with AI parameter). The setup takes about 10 minutes and should be standard for any site in 2026. Our article GEO ROI details the full setup.

Volume and trend

Sessions referred by AIs increased by 527% in one year (Previsible, 2025). For an e-commerce site, the conversion rate of ChatGPT traffic is estimated around 9.6%, compared to 5.3% via classic organic search. AI referral traffic therefore represents a high-value acquisition channel, even though its volume remains lower than Google traffic.