HelenDev - 10:56 am on May 8, 2009 (gmt 0)

QS appears to be based not just on your landing page but the whole caboodle of the structure of your campaigns, choices of keywords, ad text etc.

I am in the process of optimising our campaigns and even though I haven't even got around to sorting out our landing pages yet I managed to improve our quality scores across the board by doing all the other stuff - restructuring into small really targetted ad groups each based around a single keyphrase, and getting rid of a whole load of keywords which had a low CTR or conversion rate.