Yahoo's Search Marketing Quality Index is relatively an open book for advertisers, giving them tips on how to rank better, craft more high quality
ads and ultimately drive better campaign performance.
Google is less transparent with how it determines an ad's Quality Score -- much to the chagrin of search marketers, since it's such a huge factor in ad placement and performance. With this new upgrade however, AdWords advertisers will now have info on the Keyword Analysis page that alerts them to factors like bad landing pages or poor ad copy that could be dragging down an ad's Quality Score -- as well as tips for improving it.