Snapchat is an App that you can take photos with or without filters. You can also chat to your friends and send Streaks . Also there is a map were you can see you friends location or you can ghost yourself so no one can see your location.
The most pointless form of communication known to man. It attracts stupid teenagers and college students for god knows what reason. So you can only see texts once? So you get scored for how much you use Snapchat? So you send a blank "snap" just to keep a streak, and you're proud of your 422 day streak that you call a friendship? So it is what stupid college girls use to throw away their time?