Linkedin.com is a social networking site that is geared for career-minded professionals who want to network together.  It has all the components of a typical social network, but it doesn’t allow members to tweak their profile pages with themes and colors (like MySpace).

Contacts
This site allows members to easily maintain a list of their business connections and to email them within or outside the network.

The connections a member has can help them learn about job opportunities, get recommendations for jobs, and talk with employees at companies they might be interested in working for.  They might also view profiles of hiring managers to find out a little bit about them prior to submitting a resume or seeking an interview. Members can also send out questions to all of his or her connections.

Answers
The answers section allows members to send out questions and reply to members across the entire Linkedin network.  This feature was added in January 2007, and helps members connect with other people and share their insights with each other.

Groups
Members can also join groups to help grow their contact network, and to stay connected with whatever group interests them.  For example, there are alumni groups, corporate groups, non-profit groups, conference groups, etc.

LinkedIn went mobile in February 2008 (m.linkedin.com), which allows members to find contact information and resumes on their mobile device (Jemima, 2008). The mobile service is available in English, German, French, Chinese, and Japanese.

Demographics
Linkedin.com receives over 4 million unique visitors from the United States, and seems to attract a wealthier group of people (31% make over 100K per year, 35% make $60K to $100K). Age range skews 25 and up, with a majority of members in the 25 to 44 range.