Want to create a group chat? Either for your self or others? This is how to do it.
Click the new message icon
or click "send message" on user profile
You can create conversations to users you share at least one community with
Search for the people you want to add
Add more people to create a group chat
Now, write anything to create the chat :)
ps. Conversations can be renamed on mobile. Click the chat title to edit :)