# GitHub for Beginners: Branches, PRs & Working with Others

Quick Recap: What Is GitHub?

If you have not taken the Git fundamentals lesson yet, here is the 30-second version: GitHub is where your code lives on the internet. You write code on your computer, then "push" it to GitHub to back it up and share it.

What Is a Branch?

Imagine you are decorating your living room. Instead of moving furniture around in your actual room (risky — what if it looks terrible?), you could create a virtual copy of the room and experiment there first.

That is a branch. It is a copy of your project where you can make changes without affecting the main version.