Learning about pull requests
Pull request is the number one feature in GitHub that made it what it is today. It was introduced in early 2008 and has been used extensively among projects since then.
Note
While everything else can be pretty much disabled in a project's settings (such as issues and the wiki), pull requests are always enabled.
Why pull requests are a powerful asset to work with
Whether you are working on a personal project where you are the sole contributor, or on a big open source project with contributors from all over the globe, working with pull requests will certainly make your life easier.
Think of pull requests like chunks of commits, and the GitHub UI helps you clearly visualize what is about to be merged in the default branch or the branch of your choice. Pull requests are reviewable with an enhanced different view. You can easily revert them with a simple button on GitHub and they can be tested before merging, provided a CI service is enabled in the repository.
Note
CI stands...