Social network means a network of people
A social network, is a network of people or groups of people. For example, a collection of people who know each other, or companies that often work together. Therefore, a corporate network can also be seen as a form of social network. A social networking site is a website that lets users create a profile, which they can then link to the profiles of others within their social network. Many social networking sites focus on entertainment and keeping in touch with friends. Participants can send messages to contacts, and for example, share photos, videos, and internet links.
Well-known social networking sites are hyves, Linkedin, Facebook, etc.
The Poken is a gadget that is indented on the many network sites out there.