Click on a channel in the left sidebar, or otherwise navigate to the channel you're interested in.

The channel's name appears in the navigation bar at the top of app.

Click on a channel in the left sidebar, or otherwise navigate to the channel you're interested in.

The channel's description appears in the navigation bar at the top of app. If the description doesn't fit in the navigation bar, hover over it with the mouse to view it in full.

Click on a channel in the left sidebar, or otherwise navigate to the channel you're interested in.

Hover over the channel's name in the navigation bar at the top of app with the mouse to see the subscriber count.