Galaxy TAB S4: Icon Badges
Navigate to Apps screen > Tap Settings > Tap Notifications > Tap App icon badges > Tap the slider next to Show notifications > Tap On to activate it > Tap Home > Tap and hold the app icon
Pictorial representation of the above settings is as follows:
Note: Icon badges using numbers will show you how many notifications there are per app.
Note: Show notifications will allow you to check your notifications at a glance when you touch and hold app icons.
Note: An App Icon Badge is the orange dot that pops up on your app's icon when it receives a notification.