Banners are the pop-up notifications you see while you're using your phone. Below those options are two more: Sounds and Badges. Sounds are the audio tone alerts. Badges are the red circles with numbers that show up on app icons, for example, the one on your email app showing how many unread messages you have.
Starting with 8.0 (API level 26), notification badges (also known as notification dots) appear on a launcher icon when the associated app has an active notification. Users can long-press on the app icon to reveal the notifications (alongside any app shortcuts), as shown in figure 1.
And select which apps you allow to display badges don't worry the apps will still have new items itMoreAnd select which apps you allow to display badges don't worry the apps will still have new items it just won't be indicated by a badge. From the home screen tap. On settings next tap on notifications.
On Android, you don't have app icon badges. App icon badges tell you when you have unread notifications. An app icon badge shows you the number of unread alerts and it's omnipresent on the app icon.
App icon badges are a commonly used feature on many mobile devices. The badges appear as small dots over the logo of an app on a user's home screen and can be designed in a wide range of eye-catching colors. Fully supported by Apple and Android devices, app icon badges are easily accessible to a wide range of users.