FACEBOOK

Facebook is a social network service and a webside created in February 2004 by Marc Zuckerberg. In July 2010, Facebook had more than 500 milion active users. The users can create a personal profile where they can write things and upload pictures. Additionally, users may join common interest user groups, organized by workplace, school or college, or other characteristics.

The webside was founded by Marc Zuckerberg and some friends of him: Eduardo Saverin, Dustin Moskovitz and Chris Hughes. At first, Facebook was limited to the students of the university of Harvard, but later it was expanded to other colleges in the Boston area, the Ivy League and Stanford University.
In 2009 Compete.com named Facebook as the most visited social network by worldwide monthly active users, followed by Myspace.com.

Now, almost everybody has got Facebook, people from all ages. It became so famous because someone has started to use this social network and then much people began to create an accound too. Nowadays, I don't know anyone who doesn't have Facebook. I think that it became so famous because everyone wants to have one account for not to be different as the others.
On this webpage you can include all your personal dates and photos of you, one thing that could be dangerous. Many people now are very addicted to Facebook, some of them are all the day in front of the computer. In my opinion this is a disadvantage of the webpage. I have to admit that I'm a little bit addicted to facebook, and that sometimes I'm in front of the computer but I should be studying.