What 9 Months of AI Overview Tracking Reveals About Traffic, Citations, and GA4 Misattribution

Search Engine Land presents original tracking data from September 2025 to June 2026 showing that AI Overviews drove 7.53% of organic sessions for a tracked brand, but with significant volatility—peaking at 16–17% in February–March 2026 and declining to 2–4% more recently. The most striking finding is that roughly 22.4% of AI Overview referral events are being misattributed to the Direct channel rather than Organic Search in GA4, potentially causing teams to underreport organic performance. The data also reveals that AI Overviews cite structured, specific content (pricing, times, comparison tables) far more frequently than editorial content, with citations following distinct lifecycles tied to freshness and seasonal intent shifts.