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The Truth About GA4 Key Event Name Length Limit
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💀 ☠ The Google documentation on the length of event name in GA4 is a bit misleading.
The documentation seems to suggest that "_c" is appended to the length of the event name to mark the event as a key event. 👇
So, one might conclude that the length of an event name should not exceed 38 characters, leaving room for the "_c" suffix.