I have a bing campaign that i started yesterday. It started out really nice. Ran through $200 with in 2 hours. Today the same campaign has hardly done $50 in last 6-7 hours. I added ad scheduling to have the campaign run from 8am to 12 midnight. So it paused at might and started an 8 in the morning today.
CTR yesterday 6%
CTR today 3%
Same ads and same keywords. Nothing changed.
Any idea why impressions suddenly dropped the next day?
Bings traffic quality varies from day to day. Are you running just bing and yahoo or including search partners too?
Adding to stephen, Check your average ad position and see if someone is outbidding you.