Notifications keep you up to date with what's happening in the game, even when you're not playing.

Google Play
You can turn notifications off or on in your device settings: Settings > General > Apps > The Tribez. Uncheck or, conversely, check the Show Notifications box.

iOS
You can turn notifications off or on in your device settings:
Settings > Notifications > The Tribez > Allow notifications.

Windows
To disable notifications, you need to find the Notifications and Actions in your PC settings, then find The Tribez in the list and move the slider.