If you are presenting your screen on Teams and/or need an environment free from notifications, you can disable them with the click of a button by changing your status to Do not disturb. This means that you will only get notifications from priority contacts. 

To enable the Do not disturb status, click on your user icon in the top right corner of Teams and in the Status drop-down select Do not disturb. 

Remember to turn it off when you are ready to receive notifications again.