You can turn off notifications in two ways: from the game settings or from your device settings.
 
Option No. 1: from the game settings
 
Open the game settings (the cogwheel in the top left corner of the screen) and deactivate the "Enable notifications" option.
 
 
 
Option No. 2: from the device settings
 
Please go to your device Settings, open Notifications, scroll down until you see our app on the list, and tap Spring Valley. Here, you can customize or disable notifications.