Open the app or device settings
Go to Notifications
Turn off all notifications
Disable notifications for specific apps
Mute alerts and sounds
Turn on Do Not Disturb
Schedule quiet hours
Disable pop-up notifications
Turn off lock screen notifications
Turn off banner notifications
Unsubscribe from email notifications
Disable browser notifications
Check app-specific notification settings
Restart the device if changes do not apply
Update the app or operating system if needed