ChannelFoldersIntro

Organizations can sort channels into folders. For example, you can put all the channels associated with a team into a dedicated folder. Users can decide whether to group channels by folder in the Inbox view and the left sidebar.

Everyone can pin channels they personally want to pay close attention to. Pinned channels appear in a dedicated pinned channels section above channel folders.

Folders that only contain inactive and muted channels are sorted at the bottom.