Facebook, the world’s most widely used social network, celebrates its 10th anniversary today.

It’s come a long way from its beginnings as a wayward Harvard student’s dorm room hack. From Facemash, to “thefacebook,” to its official public debut in September 2006, to its May 2012 IPO, the social network and has undergone some pretty massive transformations in a relatively short time. Today, Facebook has 1.26 billion registered users who record 3.2 billion likes per day. The company can also claim one of the most successful initial public offerings in history, and despite criticism that it’s dead to teens (or dying in general), the social network continues to expand into new avenues and new global markets. But it’s just not the company’s grand $5 billion debut that marks its success as an internet giant. It’s things like News Feed, the Facebook Platform, and other successful experiments that define Facebook and the people behind it. In short, none of the social network’s success would have been possible without constant iteration and innovation. While not everything Facebook tried was a hit , the company learned from its mistakes and moved forward. With that in mind, here are decade’s worth of Facebook milestones.