I have 5 large sites across 3 accounts. Since yesterday the CTR on all the channels and sites have dropped about 10% - 25%. Even on sites that are on different account. Am I the only one seeing this pesky problem or is there someone out there like me?
my guess is that ads became less targetted. Can be due to: new content with different keyword advertiser(s) reached budget for keywords and now less relevant ads are showing.