The Push Queue screen displays all results from Push events.
When data is changed in any entity listed in Synchronization Rules with the delivery method of "Push and Batch" an Event is triggered. Each Event Action consists of a guard condition that will prevent the unnecessary creation of Push Queue records when no data should be pushed to a mobile application.
The Push Queue records are processed via a Database Process which will check the Ownership Query defined in Entity Details to determine which user/device to send the data to and will create a Synchronization Task to process the Push Queue records for each user/device found. If for some reason the Ownership Query returns no data then the status message will show that no user/devices found.
See the Mobile Framework Synchronization Guide and/or the Troubleshooting Touch Apps for more information.