Push
In plain terms
Uploading local commits to a remote repository.
Going deeper
Pushing sends your committed local changes to a shared remote so others can access them. It publishes your work.
Under the hood
Updates remote branches; rejected if the remote has changes you haven't merged (non-fast-forward).
Examples
git push, sharing changes, updating remotes, collaboration.
Think of it like...
Like mailing your finished pages to the shared manuscript.