TLDR: Google Analytics 4 (GA4) now combines observed measurement with modelling where direct observation is limited. Google’s behavioural modelling is subject to eligibility thresholds, including at least 1,000 daily users who have granted analytics consent and sufficient denied events over the required periods. This means many lower-volume websites may not qualify for behavioural modelling. Across
12 Months On from Consent Mode v2: Does GA4 Still Work Effectively for Marketing Attribution?