Workflow quality features like statuses, pre-receive hooks, protected branches, and required status checks help collaborators make contributions that meet conditions set by organization and repository administrators.
About statuses
Statuses let you know if your commits meet the conditions set for the repository you're contributing to.
Working with protected branches
If you're working on a protected branch, you won't be able to make irrevocable changes to the branch. You can enable required status checks on the protected branch that will prevent you from merging the pull request until all of the required checks pass. You can also enable required pull request reviews on the protected branch that will prevent you from merging the pull request until it's been approved.
Working with pre-receive hooks
Pre-receive hooks enforce rules for contributions before commits may be pushed to a repository.
