Word
Push
To push is to send the changes you have saved on your computer up to the copy of your project stored online.
Also called: push it up, send it up
The online copy usually lives on GitHub. One command, and the two copies match again.
You'll meet it after your first few commits, because until you push, everything you've saved sits in exactly one place: the machine in front of you.
What people get wrong is treating a push as the save. Committing is the save, pushing is the copy that survives a dead laptop. It's also the moment a mistake stops being private, since everything in a commit goes up with it.