A Pull Request is a feature in version control systems like GitHub that allows developers to propose changes to a codebase. When a developer makes changes in a separate branch, they can submit a pull request to merge those changes into the main branch. This process facilitates collaboration and ensures that code is reviewed before it becomes part of the main project. During the pull request process, team members can review the proposed changes, leave comments, and suggest improvements. This collaborative review helps maintain code quality and allows for discussions about the changes, ensuring that everyone is on the same page before finalizing the merge.