A method comprising: receiving, by a content management system, a notification of an interaction event, the notification indicating an interaction with a shared content item by a first user of a plurality of users, the content item synchronized between the content management system and a plurality of devices, each device associated with one of the plurality of users with which the shared content item is shared; determining, by the content management system, a type of the interaction and a priority of the interaction, wherein the priority of the interaction specifies a relative priority of the interaction to other interaction types; and determining, by the content management system, whether a respective user notification queue associated with each other user of the plurality of users other than the first user contains a higher priority interaction by the first user associated with the shared content item, wherein each respective user notification queue is a group of one or more interactions associated with the shared content item; adding, by the content management system, the interaction to each respective user notification queue responsive to determining that the respective user notification queue does not contain a higher priority interaction by the first user and associated with the shared content item; removing, by the content management system, lower priority interactions by the first user from each respective user notification queue; and sending, by the content management system to respective devices associated with respective other users, each respective user notification queue for display on a respective device associated with each respective other user; wherein determining the type of the interaction and the priority of the interaction occurs responsive to determining that collaboration is not occurring in the shared content item, wherein collaboration is when more than one user of the of the plurality of users has the shared content item open for viewing or editing. receiving, by a content management system, a notification of an interaction event, the notification indicating an interaction with a shared content item by a first user of a plurality of users, the content item synchronized between the content management system and a plurality of devices, each device associated with one of the plurality of users with which the shared content item is shared; determining, by the content management system, a type of the interaction and a priority of the interaction, wherein the priority of the interaction specifies a relative priority of the interaction to other interaction types; and determining, by the content management system, whether a respective user notification queue associated with each other user of the plurality of users other than the first user contains a higher priority interaction by the first user associated with the shared content item, wherein each respective user notification queue is a group of one or more interactions associated with the shared content item; adding, by the content management system, the interaction to each respective user notification queue responsive to determining that the respective user notification queue does not contain a higher priority interaction by the first user and associated with the shared content item; removing, by the content management system, lower priority interactions by the first user from each respective user notification queue; and sending, by the content management system to respective devices associated with respective other users, each respective user notification queue for display on a respective device associated with each respective other user; wherein determining the type of the interaction and the priority of the interaction occurs responsive to determining that collaboration is not occurring in the shared content item, wherein collaboration is when more than one user of the of the plurality of users has the shared content item open for viewing or editing.