According to an article on the American Bar Association site (http://www.abajournal.com/news/article/google_offers_legal_research_for_the_average_citizenand_lawyers_too), one purpose of the search engine is to open up legal research to the average citizen. In the past, this type of research has often required extremely expensive search engine subscriptions or confusing trips to the local law library.
Next time you face a legal conundrum, finding an answer could be as easy as finding a picture of Angelina Jolie . . . just Google it!