Social networks allow people to interact easily with people and share interests and passions. Internet knew how to capitalize this trend letting people to interact and generate content. The results it amazing, just take a look at Alexa´s top traffic websites.
| RANK | Web Site |
| 1 | Yahoo! |
| 2 | Microsoft Network (MSN) |
| 3 | |
| 4 | YouTube |
| 5 | Windows Live |
| 6 | MySpace |
| 7 | Baidu |
| 8 | Orkut |
| 9 | Wikipedia |
| 10 | |
| 11 | Megaupload |
| 12 | Hi5 |
| 13 | |
| 14 | Microsoft Corporation |
| 15 | Yahoo Japan |
| 16 | Blogger.com |
| 17 | RapidShare.com |
| 18 | Sina |
| 19 | Ebay |
| 20 | Friendster |
| 21 | Fotolog.com |
| 22 | Sohu.com |
| 23 | 163 |