I am frequently asked about LinkedIn. And, the most common question I get is... "so I signed up on LinkedIn, but I don't know what I'm supposed to do with it. Does it have any value?"
In fact, LinkedIn generates the most B2B referrals of all social media sites, including Facebook and Twitter (Source: Leadforce1, June 2010). And it also generates the most B2B lead conversions beating out the company blog, Facebook, and Twitter. (Source: Hubspot, State of Inbound Marketing Report 2011).
Let's consider the numbers. LinkedIn has 85 million users, of which 32 million are based in the U.S. The average LinkedIn user is between 35 and 49-years old, with $110k in income. Every Fortune 500 company is listed/represented on LinkedIn. Over 12 million small business people are LinkedIn users, of which 1.3 million are small business owners. Over 150 industries are included. And the list goes on. The answer to "does it have value" is YES.