Abstract: Systems and methods for providing content events that are relevant to a first user of a social network are provided. In particular, a computing device may obtain content data associated with one or more content events, obtain user engagement data associated with the first user, determine a relevance score for each of the one or more content events using a relevance predictive model based on the user engagement data and attributes associated with the respective content event, the relevance score of each of the one or more content events representing a likelihood of the first user to engage with the respective content event, ranking the content events based on the relevance score for each of the one or more content events, and presenting a subset of the content events to the first user on a user interface of a device based on the ranking.

Abstract: Techniques for broadcasting notifications with low latency are provided. A set of recipients for a notification of a content item is determined. The notification is stored in a second notifications storage that is separate from a first notifications storage. A request for one or more notifications is received over a computer network from a client device that is associated with a particular recipient in the set of recipients. In response to receiving the request, first notification data is retrieved from the first notifications storage, second notification data that includes the notification is retrieved from the second notifications storage. The first notification data is combined with the second notification data to generate combined notification data. The combined notification data is transmitted over the computer network to the client device and is stored in the first notifications storage. The notification may be removed from the first notifications storage.

Abstract: Techniques for broadcasting notifications with low latency are provided. A set of recipients for a notification of a content item is determined. The notification is stored in a second notifications storage that is separate from a first notifications storage. A request for one or more notifications is received over a computer network from a client device that is associated with a particular recipient in the set of recipients. In response to receiving the request, first notification data is retrieved from the first notifications storage, second notification data that includes the notification is retrieved from the second notifications storage. The first notification data is combined with the second notification data to generate combined notification data. The combined notification data is transmitted over the computer network to the client device and is stored in the first notifications storage. The notification may be removed from the first notifications storage.