Pull Requests 2.0 has streamlined the process of reviewing code and accepting patches by introducing a Merge Button, simplifying what previously required multiple steps on the command line. This feature is extensively utilized at GitHub and is particularly appreciated in open-source projects. Now, a single click can automatically merge and close a pull request, although if a merge conflict is detected, users are provided with manual merge instructions instead. The merge operation always creates a merge commit that includes the number, source, and title of the pull request, enhancing clarity and traceability in project management.