How to Hide Sensitive Notifications From Your iPhone’s Lock Screen

In iOS 11, your iPhone gives you much more control over notifications. You can designate certain apps as “sensitive”, so that it hides the content of notifications while your phone is locked, only letting you see the full preview when you use Touch ID or Face ID to unlock your iPhone. This works in every single app on your phone, unlike in iOS 10 and before.

via: howtogeek.com