What are the campaign 'status' options?

Once created, a campaign may be in any one of the following states.

Status Explanation
Approved The campaign has been approved for activation
Rejected The campaign has been rejected
Active The campaign is running and ads are displaying. Analytics data feeds within 1-2 hours
Paused The campaign is paused, either due to user action or low balance
Pending The campaign has been submitted and is pending review
Pending Change The campaign is pending a change requiring admin approval. Active campaigns will continue to run with existing settings during this time