What does an audit status of “Pending, servable” mean?
The creative will not serve for 24 hours
The creative will serve, but is prohibited due to unsuitable content
The creative will serve, but may be rejected after policy review
The creative will not serve until resubmitted for approval
Your creative is approved for serving, but is awaiting additional content and policy review.
Read more here: https://support.google.com/displayvideo/answer/6063030