It is one of the most widely used communication tool of recent times. In its short span of life, it has entered in people lives like anything in the world. It has been owned by Facebook. It initially gained popularity because it provides a cheap and easy alternative of calls and messages. A survey was conducted in 187 countries and according to the results; it was the automatic choice for 55% of the people. Earlier this year, the app surpassed one billion user milestones.