Android O OS – App Icon can Show Badges with Numbers or Dot-style Badges. Dot-style badge and notification preview option are newly added in Oreo OS.
How do I turn on badge notifications on Android?
Open the Settings app and go to Apps & Notifications. Go to Notifications>Notifications. Tap the app you want to enable or disable. The app’s Notifications screen will have its own dedicated Allow icon badge switch.
How do I get badge notifications on my Samsung?
App Icon Badge Settings
The latest version of Android, Oreo, has a new feature of turning off the App icon badge. Thus, make sure the App icon badge setting is turned on. Go to your phone’s Settings and tap on notifications. Scroll down to ‘App icon badges’ and toggle on the switch next to it.