Scripts can be in one of several overall statuses.
The script is not running, and may have its settings changed in the Synk window.
The script is running, but operations are suspended, typically due to either a location being unavailable or meeting the conditions from the settings to automatically pause synchronization (see Automatically Pausing Synchronization).
Synk has examined the locations and successfully performed any actions necessary to update them to the same contents.
Synk is currently examining the locations and performing any actions necessary to update them to the same contents.
Synk has determined that there are actions necessary to bring the locations into sync, but is waiting on you to approve them. See Previewing Proposed Actions.
An error has occurred that requires your attention. Typically, this is an error with a particular item (see Handling Errors), but sometimes can be something broader preventing the engine from operating as a whole.