What the hell are Git and GitHub?

Have you ever read about an interesting app, only to click the link and find yourself on a GitHub page? If you're a coder, then you will be happy about it, but if you're like me, you will scratch your head for a while, open the readme file, and start copying and pasting linux commands into a terminal window with fingers crossed. Even after watching this video I will keep doing this, but at least I know what GitHub is now.