Snapcodes are like secret handshakes, but instead of using your hands, you use your phone's camera to unlock the magic. To add someone using their Snapcode, simply open the app, point your camera at the code, and voilà! You're now BFFs (or at least, Snapchat friends).
But wait, there's more! You can also customize your own Snapcode to make it more interesting or embarrassing, depending on your mood. Just remember, with great power comes great responsibility, so don't get too crazy with those Bitmoji stickers.