A new thread at WebmasterWorld has one Webmaster complaining that pages the do incredibly well in Google AdWords have been hit hard by the MayDay update. Now, this is one person complaining, so I am not sure how much weight we should put on this report.
My sites and pages that are not good enough to be ranked or even indexed any more in the organic search (the results that are pushed even further down the page with each passing year) are absolutely fine for paid advertising (the results that are pushed further and further in the faces of users).
Over time, Google AdWords has continued to add more and more quality factors to determine ad rank and price. So AdWords is getting more and more strict about quality, more so than most networks. In fact, advertisers often complain about those "quality" factors.
I am not sure I agree with this statement and theory. Do you?
Forum discussion at WebmasterWorld.