1. A method comprising: receiving a notification of an interaction event indicating an interaction with a content item by a first user of a plurality of users, the content item synchronized between a content management system and a plurality of devices, each device associated with one of the plurality of users with which the content item is shared; determining a type of the interaction and a priority of the interaction; and for a second user of the plurality of users: adding the interaction to a notification queue corresponding to the second user; removing one or more interactions each associated with a lower priority than the priority of the added interaction and corresponding to the first user from the notification queue; and sending the notification queue associated with the second user to a device associated with the second user in response to determining that the second user is not collaborating in the content item.