| Add comments to a friend’s picture | 83% |
| Post messages to a friend’s page or wall |
77 |
| Send private messages within the SNS system |
71 |
| Post comments to a friend’s blog | 66 |
| Send a group message to all your friends |
54 |
| Send IM or text messages to friends through the SNS system |
54 |
| Source: Pew Internet Project | |