Interesting Case(s) Related to Google Keyword Advertising

Google's whole advertising arm has always interested me, just as the way they come up with site rankings. There are volumes written about how you achieve a better Google ranking in particular (something I have to worry about with some of my work but not something I play with my blog where quality of readers interests me and quantity I care nothing about) but I have yet to find a correct formula. In experience with clients, I can tell you it's more mercurial than you might think.