The Referrals tab in AI Traffic lists your pages with their answer fetches, AI-referred visits and visits per answer fetch over the last 7, 30 or 90 days. A high value means answers that read the page tend to send people to it. A low one marks a page AI systems read but few people arrive from.
Visits come from GA4 or PostHog, and a page shows a value once its analytics cover the whole window. Answer fetches come from your AI Traffic sensors. Your agents get the same figures over API v2 and MCP.