• You ran out of funds: campaigns stop receiving traffic when you have no balance on your account
• Your bid is too low: there might be campaigns which outbid you
• Your campaign has been flagged: you can check the flags per each banner/URL when you click on the blue flag next to your banner/URL - in the Ads tab
• No available traffic for the selected targeting: please check how many impressions are available for the selected targeting with your account managers or contact support@runative.com