Here’s a nice new feature in Microsoft Teams… you can hover over the name of a channel and a channel card will pop up with useful information about the channel. Here’s how that works…
Here’s an example of a channel card in Teams. To see the pop-up card, I hover over the name of the channel at the top. The pop-card shows me some useful information about the channel, such as the name of the channel and the team it’s in, what type of channel (in this case, standard), icon links to manage the channel and notifications, the description of the channel (if available), and most importantly… when was the last activity in the channel:

I love this new feature and the information you can get without having to dig around for it.