Teams - Turning on Notifications

1. Go to Teams Icon in Microsoft Teams Application 
2. Click on the Channel you want notifications from 
3. Select the three orbs to the right of the channel and click Channel Notification
4. Change the All new post from Off to Banner and Feed (can can also select if you want notifications on replies).  Update Channel Mentions to the same if you don't already have it as Banner and feed
5. Click save and you are done

If you would like to see a video you can watch here:

Teams Notification