1. If you use BeautyPlus for a certain amount of time, a pop-up window will ask you whether you would like to turn on notifications. Please select “Allow".
2. If you selected "Not Now" before, you can turn it on by going to System Settings - BeautyPlus - Notifications.
Note: You may not be able to find Notifications in the System Settings under BeautyPlus if you have not been shown the pop-up window in BeautyPlus. In this case you can try taking a photo and saving it in BeautyPlus, then close the app and open it again to try to trigger the pop-up window.