Facebook is a social networking site. It was launched in 2004 by Mark Zuckerberg together with four fellow students at Harvard University in Cambridge, Massachusetts. The site rapidly became very popular. By 2016 Facebook had over 1.6 billion monthly active users.
Facebook now has its headquarters in Menlo, California. It is a global company which has its European headquarters in Dublin where it employs over 1,600 people. Facebook began operations in Dublin in 2008 with just 30 employees.
Facebook was launched in the year 2004 On This Day.