GA4 Custom Event

A GA4 custom event is an event a site owner defines to measure an interaction not adequately covered by automatically collected, enhanced measurement, or recommended events. A lawn care website could use one for a meaningful step in its custom estimate process, provided the event is implemented correctly. This differs from an event parameter, which adds details to an event, and from marking an event as a key event for reporting. Event names, parameters, and reporting behavior should follow Google's current guidance. A custom event does not prove that a form reached the sales team; the measured action must be checked against the actual business workflow.