Right, but they are referring to configuration on a GitHub repository that can make squash merge automatic for all pull request merges.

e.g. When clicking the big green "Merge pull request" button, it will automatically squash and merge the PR branch in.

So then I don't need to remind or wait for contributors to do a squash merge before merging in their changes. (Or worse, forget to squash merge and then I need to fix up main).