Pin channels that are important to you or that you want to access quickly. Pinning a channel moves it to the top of your channel list. You can also reorder your pinned channels to prioritize them. This only changes your view and won’t change views for the rest of your team.

Try it out for yourself: go to the channel of your choice, select More options   >Pin. Or right click the channel name and select Pin.

So finally Microsoft has released the ability to pin various objects around the different screens in teams. This is a fantastic addition to the product and something we’ve heard about on the road map for some time.