Many of us are part of multiple Microsoft Teams, which can often lead us to search for the specific channel that we need.
Microsoft have provided an easy-to-use solution for this, by making available pinning for your most-used channels.
This is how to set it up:
Click on the ellipsis of the channel you want to pin.
Now see that the top of your Teams left panel will hold that Team channel.
If you no longer need it, click on the ellipsis again and unpin.