A merge queue helps increase velocity by automating pull request merges into a busy branch and ensuring the branch is never broken by incompatible changes.

The merge queue provides the same benefits as the Require branches to be up to date before merging branch protection, but does not require a pull request author to update their pull request branch and wait for status checks to finish before trying to merge.

Using a merge queue is particularly useful on branches that have a relatively high number of pull requests merging each day from many different users.

Pull request merge queues are available in any public repository owned by an organization, or in private repositories owned by organizations using GitHub Enterprise Cloud.

Pull request merge queues are available in any organization-owned repository on GitHub Enterprise Server.

Not for your personal GH account. If you have an open source project that gets contributions from multiple people multiple times a day, then create an org account, and move the repo there.