A primer on the photosharing service that Facebook reportedly offered to buy for $3 billion.
.... How does Snapchat actually work?
Once you've found your friends on Snapchat, you can simply start taking pictures and sending them out to as many friends as you want.The app has a couple of distinguishing features in terms of photo taking. One, users can draw on their photos. So that's funny sometimes. Two, you can caption any photo. Three, you get to set how long — from 1-10 seconds — the photograph will be visible to receivers. Crucially, too, the app tells you when your snaps are opened by the receiver. You know they saw it....
Via Jeff Domansky