It happened with one campaign to such an extreme amount that I was hardly getting any impressions and zero clicks. Despite not changing anything. So I deleted the campaign and asked my husband to copy my keywords and ads to his account and immediately the next day it got huge amounts of impressions and a great amount of clicks. Same ads and same keywords and same bid amount. Then today the impressions are slowed again. Despite the account or adgroup or any keywords not saying they are slowed at all.
What is going on? Do I have to constantly delete and restart campaigns to get them to run at full delivery each and every day? I would like it to be consistent so I can set it up as it works the best and just let it go and work. What am I doing wrong?
I'd advise contacting AdWords support using the 'Contact Us' link within the account, and letting them take a detailed look.
Still, I'm going to take an educated guess:
I'd guess that you have very large quantities of keywords, and that they are probably quite general in nature. I suspect that these keywords, because of their quantity and general nature are getting a ton of impressions very quickly, but with a very low CTR.
Because the reporting of stats is not real time, and runs several hours behind, you're probably not getting an accurate picture of what is happening in my account - because it is happening too quickly. But, my guess is that you're getting thousands of impressions account-wide, with a low overall CTR, within a very short period of time. This in turn is most likely causing the entire account to be slowed, but long before the stats catch up to reflect the fact.
If this is indeed what is happening, the way to fix it is to be much more targeted with your keywords and ads.
Hope that makes sense.
AWA