If you ask people why do they only use google - they would reply because google has answer to everything I ask. and if you still gaze them with an unsatisfied look they fumble a bit and then snap- because google gives me the most relevant answers- and there you have it. Google is famous not because it knows everything but because it knows what you want to know and then replies accordingly. But the question is how do google do this? Google’s success is built not on collection of a huge data but a new kind of data. Back in the days before Google there were few search engines like Meta Crawler, Lycos, Alta Vista and they were hardly reliable. Sometimes, if you were lucky, they managed to find what you wanted. Often, they would not. If you typed “Bill Clinton” into the most popular search engines in the late 1990s, the top results included a random site that just proclaimed “Bill Clinton Sucks” or a site that featured a bad Clinton joke. Hardly the most relevant information...