15. The computer system of claim 13 , wherein identifying the higher frequency of user interactions with the first set of notifications comprises: identifying patterns in the user interactions with the first set of notifications, the patterns describing the characteristics of the interactions of the user with the first set of notifications.
15. The computer system of claim 13 , wherein identifying the higher frequency of user interactions with the first set of notifications comprises: identifying patterns in the user interactions with the first set of notifications, the patterns describing the characteristics of the interactions of the user with the first set of notifications. 17. The computer system of claim 15 , wherein identifying the patterns in the user interactions comprises: identifying a type of notifications from the first set of notifications most frequently interacted with by the user; and providing the second set of notifications of third-party content objects of the identified type of notifications to the client device.