A ChatChannel is a special class, that represents a channel on the ROBLOX chat. They cannot be created with Instance.new(), but with the :AddChannel() function of ChatService.
The name of the ChatChannel.
The message shown to a player on joining the channel.
Whether or not this channel can be joined using /j <channel>.
Whether or not this channel can be left.
Whether or not this channel will be automatically joined when a new ChatSpeaker is made.
Whether or not this channel will be shown when ChatService:GetChannelList() is called.