The git push command uploads your local branch commits to a remote repository, making your changes available to other team members and updating the remote branch with your local work. This is a critical command for collaboration, as it's how you share your code changes with others. When you push, Git sends your commits, along with any necessary objects (files, trees, etc.), to the remote repository. The command requires you to have write access to the remote repository. The first push of a new branch typically requires the -u flag to set up tracking between your local branch and the remote branch. Pushing only sends commits that exist locally but not on the remote - it won't overwrite remote commits unless you use force push (which should be used with extreme caution). Regular pushing is essential in team environments to keep the remote repository up to date with everyone's work. The command also supports pushing tags, specific branches, or all branches. Understanding when and how to push is fundamental to collaborative Git workflows and prevents conflicts by keeping all team members synchronized.