The most popular social network - Facebook, which has 2.3 billion users worldwide - is 15 years old, writes bTV.
On February 4, 2004, the creator of the network Mark Zuckerberg launched it online. Today, the company is part of the everyday life of a quarter of humanity.
It costs $ 500 billion on the stock exchange and buys $ 22 billion in net profit per year.
The largest global social media network, Facebook, is launching a content review centre in Sofia, Bulgaria, this week.
The news, first announced by Capital weekly, was confirmed to BIRN by the Head of Corporate Communications for Central and Eastern Europe of the company, Jan Ściegienny, on Tuesday.