https://phys.org/news/2018-06-snapchat.html

Something about snapping, sharing and then forgetting about life's little moments has massive appeal for kids. And for the most part, that's what they use Snapchat for. The app has a lighthearted design, and its photo filters and effects tend toward rainbows and flower crowns. But other features pose some risks: Snap Map lets friends see each other's location on a map, which isn't always safe; Snapstreaks requires kids to exchange messages for as long as possible, which is a major time-suck; and Discover offers some age-inappropriate content. With your guidance on privacy, safety, social media pressure and marketing, though, Snapchat can be a fun way for teens to connect.

Snapchat is a popular messaging app that lets users exchange pictures and videos (called snaps) that are meant to disappear after they're viewed. It's advertised as a "new type of camera" because the essential function is to take a picture or video, add filters, lenses or other effects and share them with friends.