LinkedIn is the only social medium specifically focused on business. It functions a bit like Facebook in that users find “friends” in the form of “connections,” and the service features a “news feed” of users’ status updates, which tend to be business-related — job updates, links to business news articles, and so forth. It’s the best social network to help you find a job (rather than hurt – if you’re jobhunting, you might want to check those Facebook privacy settings!), and a great place to network.
LinkedIn currently has 300 million users, of which 187 million are active monthly. More than 39 million are recent college graduates, and a surprising 41% of visits are mobile – further demonstrating the growing importance of the mobile market.