It is the same as personal chat, but for multiple users
To create a group chat – go to Chats List and tap on “Create Group“, type name of the chat, and invite users into the chat. Group chats have an Admin (person who create a chat) and Participants. Only Admin can invite or remove people to the group.
You can specify group topic, or upload an group avatar.
Select the participants in the group chat.
Tap Create and start chatting in group.