And it's a services that can be used on any platform as proven by the fact that we can now download Facebook for PC.
More than 10 years after, Facebook has become the most popular social network in the world, way ahead of any other one, with more than 1.7 billion users and expecting to reach 2 billion in a short period of time. If there's a social network par excellence, that's definitely the one created by Mark Zuckerberg around 2004 and initially conceived for Harvard University students.
