What can you do with bbm?

Answer 1

You can add someone and then chat to them, send them a voice note, send them a picture, send them a video, send them music, PING them ( if their phone is on silent so they cannot hear the phone it vibrates / makes a noise anyway ) share you pictures, broadcast a message to the selected contacts, Make BBM groups, Look at other people's profile.

Hope this helped!

Also, when you semd someone a message, you can see if they have read it or not (unread=D, read=R) They can do the same for you too. :)