LinkedIn - Onesheet
LinkedIn is a relatively “closed” social network – “closed” in that you have to be somewhat active to get the most out of the network. While it is possible to see someone’s online resume without being logged in, LinkedIn is most useful when you see his or her connections and references.
How LinkedIn works..
According to LinkedIn, you should only link to people you know and trust. That way, other clients and contacts will have more trust in that person and your other resources based on your opinion. However, you can utilize your connections to introduce you to knew connections, and by LinkedIn partnering with resources such as Businessweek, its now even easier for you to find out who’s doing what – and who their connections are.
…In the real world.
Most just try to connect with as many people as possible. For someone trying to reach an audience of potential employers, they want to make as many connections as they can to become that much closer to someone who may be looking for their services in the future.

