Snapchat is the most widely used social application among small teenagers because of some really good functionality to socialize with your friend like creating streaks, sending snaps, and time-sensitive notification.
If you are confused about what is time sensitive on Snapchat then let me clear this up, this is the feature in which you will be notified of some Snapchat notifications that have higher priority in the do not disturb mode.
The feature, called snapchat stories, allows users to share photos and videos with their followers for a 24 hour period before they disappear.