Facebook doing some changes in notification tab. Users got the different notifications about friends updates relevant content about everything. Now Facebook is doing to split notification tab in 8 different sections like
If you get familiar with upcoming friend’s birthday then Facebook give the notification.
If anything happening with friends day by day and also get the notifications of newly joined events.
If you want to eat something or shopping then you only enable the Facebook location service which is given by Facebook. This feature give you the information of delicious restaurants, hotels and also shopping malls.
If you want to see the three top topics of your news feeds then Facebook introducing this feature.
Locally Shared News
Today in the Past
Users can manage these features manually like if you see the most using feature first then enables this feature in notification tab and give the highest priority.