GIT pull request and add pull request to branch

 GIT pull request :

Create a pull request to get your code reviewed before merging your changes. Review code in a pull request to compare changes made to the original code and add comments and feedback. See the build status for the most recent commit to the repository.

https://support.atlassian.com/bitbucket-cloud/docs/use-pull-requests-for-code-review/

GIT how to set up pull request in a branch :

https://eliteionic.com/tutorials/requiring-pull-requests-and-reviews-in-your-git-workflow/