All conversational types, including public or private channels and direct messages can be added to your Favorites List. Favorites are grouped together for easier access.
To favorite a channel in the Web/Desktop interface, click on the star icon in the upper left corner of the message area (next to the room name).
The star is then highlighted. To unfavorite a channel, just click on the star icon again.
Highlighted channels are listed under Favorites on the left navigation panel.
There are two methods: