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

Google Analytics GA4 Hard

Google Analytics GA4 — Hard

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

Key points

  • Event-scoped dimensions impact event-level metrics
  • User-scoped dimensions impact user-level metrics
  • Event-scoped dimensions require unnesting event_params in BigQuery
  • User-scoped dimensions appear in user_properties in BigQuery
  • User-scoped dimensions persist across all events for a user

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