git push

The git push command is used to upload local repository content to a remote repository. Pushing is how you transfer commits from your local repository to a remote repo. 

git push updates the remote branch with local commits. It is one of the four commands in Git that prompts interaction with the remote repository. You can also think of git push as update or publish.

By default, git push only updates the corresponding branch on the remote. So, if you are checked out to the main branch when you execute git push, then only the main branch will be updated.

Sources:

https://github.com/git-guides/git-push