…we have incorporated three main improvements to Quality Score:
Quality Score is now more accurate -- because it is calculated at the time of each search query
Keywords are no longer marked 'inactive for search' -- all keywords are active because they are evaluated for every relevant query
'First page bid estimates' replace 'minimum bids' in your account -- providing a more actionable and useful metric to advertisers
Source: Inside AdWords
Quality Score improvements might frustrate Google AdWords users and seasoned campaigners. Even Don Reisinger from TechCrunch feels that Quality Score improvements are kind of controversial.
Google AdSense earnings will increase after Quality Score improvements?
Well, that was the bad news. The good news probably benefits Google AdSense publishers. Quality Score improvements just might raise bidding rates and that will possibly increase the earnings of Google AdSense publishers in the near future. Yeah! :-)
Google Tweaks Its AdWords Algorithm