I have done every thing I can, followed every rule point-to-point and still my QC sucks. My site content is perfect, matches my Ads and keywords everything matches perfectly. but my QC sucks I have been seeing sites with no content, having only iframe code ranking in first page sponsored results for high bid keywords, how do they do it?
Go to google keyword tool... enter your site in the website description & get the keywords.. see what Google thinks your site is relevant for...
QS is simple. For the keyword you want to improve have that keyword appear in the page title and through the site copy. Google doesnt like single page landing pages, so put some discreet links to other pages you have that also have related keywords.