Facebook, world’s top social networking site, has reached a new milestone of 1 Billion users. Mark Zuckerberg made the statement on Facebook. Facebook has been growing strongly in India, Brazil & other countries. It officially hit the 1 billion user mark on Sept. 14. Facebook also went public recently. It debuted at $38 a share. Facebook’s mobile site is also receving millions of users & it has been aggressively pushing its mobile strategy. It has also released a fact sheet on 1 billion people. Facebook has become a part of marketing strategy for all the companies & it is playing a critical role in providing visibility to the companies & brands. More than 1.13 trillion likes since launch of like in Feb 2009 & it has become a critical parameter to measure the success of brand pages. Billions of photos have been uploaded & millions of songs have been played.