Marketing & measurement
Key event
In GA4, an event marked as important to the business.
In everyday use
A completed purchase is marked as a key event.
What to keep in mind
Marking an event changes its reporting importance; it does not repair missing, repeated or incorrect tracking.
Also searched as: GA4 key event
Further reading
Original explanation and example by Perspectism. Further reading may cover the wider subject, rather than this exact wording. Edition updated 7 October 2026.
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