Make sure your account has enough credit to run the entire campaign. You can check and refill account funds in Settings > Account or by contacting your Adobe Account Team.
Confirm that the campaign dates and budget are accurately set.
Make sure the placement status is “Active” or “Scheduled.” Also, verify that the other placement parameters (such as the site list, budget, goal, flight dates, and frequency) are correct.
Confirm that all ads are attached, approved, and active. Also, verify that all tracking pixels are attached and functioning.