When you receive new notifications, such as messages or missed calls, indicator icons appear on the status bar at the top of the screen. To see more information about the notifications, drag the status bar down. To close the view, swipe up on the screen.
To open the notification panel, drag the status bar down. To close the notification panel, swipe up on the screen.
To change the notification settings of an app, tap Settings > Apps & notifications > Notifications > App notifications and tap the app name to open the app settings. You can turn off or on the notifications per each app individually. To see the apps which are not allowed to send notifications, tap All apps > Apps: Turned off.