Snapchat is a photo messaging app that allows users to take photos, record videos, add text and drawings, and send "Snaps" that last 1-10 seconds to contacts. The app is popular among 13-23 year olds who want to share funny or embarrassing moments temporarily without anxiety of permanence. It has over 350 million daily users. Brands are also using Snapchat to engage this young audience through curated "Stories" and live events. While easy to use and focused on ephemeral sharing, Snapchat faces challenges around privacy and security as images can still be screenshotted without notification.