Right from the days of Altavista to Google, search has undergone a paradigm shift. Now, Google is the king of search. Whatever Google does to its algorithm, it will have a profound effect on the online world. Its recent changes (Penguin & Panda), created ripples with the way it affected search results. Past few years has seen the growth of mobile & tablets resulting in more local searches. Google correlate, a product from Google labs, finds search patterns which correspond with real-world trends.