Are you LinkedIn?

Unlike Facebook where, family, friends and colleges are all mixed up, LinkedIn is a professional networking social media website. This is the place to connect, re-connect or get introduced to people in a professional setting.

This list of connections can then be used in a number of ways:

• A contact network is built up consisting of their direct connections, the connections of each of their connections (termed second-degree connections) and also the connections of second-degree connections (termed third-degree connections). This can be used to gain an introduction to someone a person wishes to know through a mutual, trusted contact.
• It can then be used to find jobs, people and business opportunities recommended by someone in one's contact network.
• Employers can list jobs and search for potential candidates.
• Job seekers can review the profile of hiring managers and discover which of their existing contacts can introduce them.
• Users can post their own photos and view photos of others to aid in identification.
• Users can now follow different companies and can get notification about the new joining and offers available.
• Users can save (i.e. bookmark) jobs which they would like to apply for

(info from wikipedia)

Think of it as a combination or tradeshow/job fair on the internet.  It is a great place to tell people about your company, products and services.