Social networking sites are probably one of the most popular past time activities found on the internet. There are hundreds of millions of users. The three biggest ones would have to be Facebook, MySpace, and Friendster. Another very popular social networking sites is Google's Orkut, which according to Wikipedia, has 90 million users. Facebook is the most popular one simply because it is very user friendly. It's very easy for first time users to navigate through the site. Facebook is build more on the notion of keeping up with all of your friends. As soon as a friend post something or comments on something, it is seen on your news feed. The ability to maintain relationships with people you haven't seen from the past, helped Facebook gain a lot of older users that other social networking sites didn't have. MySpace gained its popularity due to its easy navigation and complete customization. Nowadays it's all about individuality, so the ability to customize EVERYTHING about your profile made it extremely popular with teens. Also MySpace has a huge focus on the entertainment industry. Many artists post their new songs on the site, film studios post trailers of upcoming movies, and more. Friedster focuses a lot more on the relationship between you and your friends. Besides the classifieds section, which to my surprise was very impressive in size, Friendster doesn't offer anything else. Orkut is a typical Google site. It's easy to use and for those with a google account, easy to sign up for. Orkut is more of GChat addition. While you still have your typical profile where you can post pictures, videos, and status updates, the chat side of the site takes a lot of emphasis. So while all four have their own benefits, it all depends on what the individual is looking for to choose the social networking site that is right for them.