Snapchat is a photo messaging service and mobile app that allows users to exchange photos and videos that are automatically deleted shortly after viewing. The messages are deleted both from the Snapchat servers and the receiving device. The user who sends the message can configure the delay on message deletion to be between one and ten seconds, or allow users to keep the image for an indefinite amount of time.
- Story - A "snap" photo or video that is visible to all friends for a customizable amount of time.
- Streak - A feature of the app which tracks how many consecutive days two users send snaps to one another.
- Snap Score - A points system which awards users points based on how much they interact with other users.