jivodeiga - 7:25 am on Feb 14, 2011 (gmt 0)
Interestingly, there were few neg's that were affecting the CTR. Adding those to the neg's has certainly made the campaign more focused. However, I see a swing in the QS for many of keywords even though CTR is good for them.
A keyword having CTR of 4% is swinging from 3-6, presently at 4. Is it a affect of competitive bidding that is going on continuously.