tommytx - 2:02 am on Mar 29, 2013 (gmt 0)
If you have nothing to do for a couple of hours, read this for a mind boggling argument on what is and what is not true on quality score.
Wow! That even made me weary about QS...But no matter what google says, I will never be convinced that Negative keyword used correctly will NOT indirectly raise the quality score of you entire campaign. IT WILL! Since we know for a fact that bad impressions will decrease, and CTR WILL increase... it has to since you are showing more ads that are more likely to get clicked... and if CTR goes up so will your QS.... its easily proven... Simply take any account with the QS averages pretty stable.. apply very careful and correct negative keywords.. a nd watch you QS overall go up... it will happen...