In Git, staging refers to the process of preparing changes to be committed to the repository. The staging area is a file that stores information about what will go into the next commit. When you make changes to files in your working tree, you can selectively stage those changes that you want to be part of your next commit. Staging allows you to record changes in small commits and to split up one large change into multiple commits. It also helps in reviewing changes by allowing you to "check off" individual changes as you review a complex commit.

Before you commit a file with Git, you need to stage the change first. This way, you can stage multiple changes in a single commit. You can stage files using the git add command. Once you have staged your changes, you can commit them to the repository using the git commit command.