Abstract: A method of providing content to users of a relationship network is disclosed. The method comprises: receiving an indication of a target content item; analyzing content interaction history data for users of the relationship network to determine a probability metric for a target user of the relationship network, the content interaction history data indicating, for each user of a plurality of users of the relationship network, content items with which that user interacted, the probability metric indicating a probability that the target user will access the target content item; determining if the target user meets a content forwarding criterion, the content forwarding criterion comprising a threshold for the probability metric; and providing the target content item to the target user if the target user meets the content forwarding criterion.