What Do Facebook Notification Symbols Mean? | Techwalla
From comments to "likes," friends use Facebook to reach out to each other in a variety of formats. Facebook lets you know about each incoming communication with a notification or alert that flashes up on the banner at the top of the Facebook screen.
The small white number in the middle of the box represents how many new notifications you have. For example, a red squate with the number "5" inside of it ...