The interactive nature of social networking sites keeps visitors coming back. MySpace enjoyed the highest retention rate among the group, with 67% of all March 2006 at-home visitors returning in April 2006. MSN Groups and Facebook also benefited from a loyal following, with 58 and 52% of visitors returning month over month, respectively. Xanga.com and MSN Spaces rounded out the top five sites ranked by retention rate, with 49 and 47%, respectively.
| Retention rates among social networks | |
| Network | Retention rate |
| MySpace | 67.04 |
| MSN Groups | 57.62 |
| 51.73 | |
| Xanga.com | 48.92 |
| MSN Spaces | 47.33 |
| Source: Nielsen//NetRatings | |