Stickers are free animated and still pictures of cats, smiley faces, and even characters from current animated movies. You can download as many free sticker packs as you want from the store in the app.
Updated:Caption:Sarah MitroffPhoto:Screenshot by Sarah Mitroff/CNET
No matter what you're doing on your device, Chat Heads will pop up (if enabled) as soon as you receive an incoming message. This makes it easy to quickly reply and get back to what you were doing previously.
Updated:Caption:Sarah MitroffPhoto:Screenshot by Jaymar Cabebe/CNET