Teams are made up of channels, which are the conversations you have with your colleagues. Each channel is dedicated to a specific topic, department, or project.
By default, all members of a team can create channels. A standard channel is open for all members and anything posted is searchable by others. If you need a smaller audience for a specific project, you can create a private channel for your team.
When you need to create or edit a channel, use the steps below:
Create a standard channel
To create a standard channel, start in the team list. Find the team name and click "More options 
> Add channel". You can also click "Manage team", and add a channel in the "Channels" tab.
You can create up to 200 channels over the life of a team. That number includes channels you create and later delete.