A bitmoji is a customized avatar that can be added to Gmail, Messenger, Slack, and social media networks. The bitmoji app allows you to create this cartoon representation of yourself, then create different versions of the avatar in different situations. In addition to using your bitmoji as a profile picture, you can use it to create custom messages to share in messaging and social apps. Bitmoji is owned by Snap, the parent company of Snapchat, and is well integrated with the Snapchat app.
Learn more: How to Use Snapchat: A Guide for Beginners