Do you have a LinkedIn profile? If you do, do you think that only people who are looking for a job are using it? Was the last time you updated your profile over a year ago? If so, then I’m guessing you are underestimating the power of LinkedIn. At this point in time, more than 400 million people use LinkedIn. One way to think of LinkedIn is that it’s the Rolodex of the digital age. It is where you manage your professional reputation.