ChatGPT traffic is increasingly important for e-commerce sites but often goes undetected in Google Analytics 4 because it appears as Direct or Unassigned traffic (Practical Ecommerce). The issue occurs because ChatGPT adds a "noreferrer" attribute to external links for privacy reasons, hiding the referral source from GA4 (Practical Ecommerce). Despite lower volume than organic search, ChatGPT traffic is often the most engaging source (Practical Ecommerce).
To surface this traffic, practitioners should navigate to Acquisition > Traffic Acquisition in GA4, filter by session source/medium containing "gpt", and create custom reports for quick access (Practical Ecommerce). Further analysis via the Engagement > Landing Pages report, filtered for "gpt" sources, reveals which pages ChatGPT cites as solutions and helps infer the underlying user prompts (Practical Ecommerce). Commerce teams should cross-reference these findings with Google Search Console's AI Mode prompts and Bing Webmaster Tools' grounding queries to optimize content for AI-driven discovery (Practical Ecommerce).