Enabling a data bridge
From within the data bridge settings area you'll have a simple dropdown allowing you to specify whether the data bridge should be running or not:
When enabled, approximately every 15 minutes, an automated task will run that copies the data from Property Hive into a format that the installed theme can understand and work with.
When enabled you'll have this setting:
By enabling this you can specify that only properties changed since the last time a sync ran get synced.
This can improve efficiency and reduce the time that syncs take.