What is the difference between ‘event-scoped’ and ‘user-scoped’ custom dimensions in GA4’s reporting impact?

Question

Google Analytics GA4 — Hard

What is the difference between ‘event-scoped’ and ‘user-scoped’ custom dimensions in GA4’s reporting impact?

Accepted Answer

Event-scoped custom dimensions join to each individual event row in GA4, impacting event-level metrics. User-scoped dimensions persist across all events for a user, affecting user-level metrics. This distinction is crucial for understanding how custom dimensions impact reporting in GA4.