Definition
What is Event (GA4)?
An event in GA4 is the fundamental unit of data collection. Every user interaction, from a pageview to a button click to a scroll, is recorded as an event with a name and optional parameters. GA4 collects certain events automatically (page_view, session_start, first_visit), while others must be configured as recommended or custom events.
Why it matters
Understanding the event-based model is essential for configuring GA4 correctly, because misnamed or missing events lead directly to gaps in your reporting and broken conversion tracking.