Reducing the number of notifications that are external to your Facebook App will reduce you exposure to Spam and Phishing attempts.
Reduce the number of external notifications from Facebook
It can be easy to confuse a real message with a fake message.
Phishing is an attempt by someone to steal your information by tricking you into given them your personal info such as your phone and password details. They do this by pretending to be Facebook and asking you to update your account info etc.
There are two ways Facebook can contact you outside of their app. Text messaging or emailing you. You really don’t want Facebook to contact you by text message or email as you leave yourself open to Phishing attempts.
The guide below will explain how to turn off your email notifications for non-important things but leave on email notifications for important things like changing your password etc.