"For something that is used so often by so many people, surprisingly little is known about ranking at Google. This is entirely our fault, and it is by design. We are, to be honest, quite secretive about what we do." So says Udi Manber, Google's vice president of engineering and search quality.
Yet in this blog post, Manber acknowledges that the veil of secrecy around Google's ranking algorithms hasn't completely been in the giant's best interest, and sheds some light on the people and processes behind positioning on the SERPs.