Facebook leading the Social Networks with a Huge Difference

In this modern era, the social networking sites are becoming popular day by day.Facebook , Google+ , Twitter , My Space , Linked in and Orkut are most common social networking sites.
From few years everyone knows that Facebook is at the top rank of busiest social networking sites all over the entire world,but, if you really have a look on the difference of Facebook users from other social networking sites,you will definitely get shocked to know that Facebook got 750,000,000 users and broke all the previous social networking sites users records.It means that Facebook has  users thrice of Twitter.
Such an extreme difference ensures the  Facebook to be the world's most successful social network.