Name Recognition - Google has been a household name ever since I was in high school (10 years ago). It has become a household name and even a verb, "Google it". They are a heavily branded company starting from their search engine and going all the way down to their software and hardware.
Search Engine Leader - Their proprietary internet search method has consistently been ranked as one of the best at returning the most relevant data. Here they pretty much have an unlimited marketing opportunity as millions of people visit their site daily. The majority of their profits come from add clicks.
Innovation - Google is constantly on the verge of innovation. First it was with their search engine, then with their Android freeware open source mobile operating system, and lately with their hardware with the Nexus & and Motorola Mobility.
Best Place to Work - They are Consistently ranked as one of the best places to work, which goes a long way in attracting the newest and most innovative thinkers.