Effective code review catches bugs before they’re deployed, improves code consistency, and helps educate new developers. We’re adding new features to make code review on GitHub faster and more flexible.
A few include a handy timeline indicator showing what you might’ve missed after reviewing a pull request, and a way to filter filters in a pull request by type (e.g. maybe you just want to look at the CSS files).
No matter what kind of developer you are, you'll need to know git. Git is version control that unites us all. Frontend Masters has a great deep-dive on git, taking you well beyond the basics and into stuff like git hooks, rebasing, and dealing with merge conflicts, which you'll be very glad you know.