Question

What is merge_group Webhook event type in GitHub?

Answer 1

merge_group

Webhook event payload	Activity types	GITHUB_SHA	GITHUB_REF
merge_group	checks_requested	SHA of the merge group	Ref of the merge group

Note: More than one activity type triggers this event. Although only the checks_requested activity type is supported, specifying the activity type will keep your workflow specific if more activity types are added in the future. 

Runs your workflow when a pull request is added to a merge queue, which adds the pull request to a merge group. 

For example, you can run a workflow when the checks_requested activity has occurred.

on:
  merge_group:
    types: [checks_requested]