to learn about <a href="https://git-scm.com/">Git</a>, the version control system at Github's core. Git fundamentally changes the way you work with your code in the same way that things like copy and paste and unlimited undos changed the way you worked with documents. Learn to create repos, branches, commits. It takes some time to get used to Git, but that time will be well worth it the next time you roll back to a previous commit state. In the same way, Github changes the way you work with others, because 