Since I just wrote an article on how to change the time to show the notification popup, I thought I would also write one on how to disable or enable app notifications in case you want to go that route.
– Open the Start Menu and click Settings
– Click the System option
– In the left pane, click Notifications and Actions
– If you want to completely disable the app notifications, move the slider for Show App Notifications to Off
– If you only want to disable notifications for specific apps, scroll down and find the app, then move the slider for that app to Off