Operation chaingsc_dimensional_trend + market_share_breakdown → significance_check
Significance−11.8% vs prior 12 weeks, p = 0.004, real. How-to guides −22.4%; product pages −1.7% n.s.; comparisons +0.4% n.s.
ComparisonPrior 12 weeks and same weeks last year (flat, seasonality ruled out).
Sources & freshnessSearch Console (yours, lags 1 to 2 days) · results-page observation (Quattr, daily) · AI-surface observation (Quattr, daily).
BoundaryAI Overview correlation is observational, stated as correlation until causality is earned by design.