There was a time when Google had no profits. It was madly searching for sources of revenues. Then in 2003 they hit upon the AdWords gold mine and as of Dec 2011, Total Ad revenue stood at $ 36.5 Billion (Google’s total revenue was $ 37.9 Billion).

As per Google’s 2011 SEC Filing, “The goal of AdWords, our primary auction-based advertising program, is to deliver ads that are so useful and relevant to search queries or web content that they are a form of information in their own right.…