If You’re Not on LinkedIn, You Very Nearly Don’t Exist
Considering that more than 90% of recruiters use LinkedIn as their primary search tool, this is not an understatement. If you’re a professional, you need to not only be on LinkedIn, you need to be using it to your full advantage. Don’t believe me? Think about it this way: If tomorrow morning, a recruiter logs onto LinkedIn looking for someone in your geography, with expertise in what you do, and you’re not there? Guess who they’re going to find and contact? Yes, that person’s name is “not you.”
If you figure out how to harness the power of no other social media tool for job search, figure out LinkedIn. It’s (by far) the best resource we have available today for career and job search networking, for finding people working at companies of interest, and for positioning yourself to be found by a recruiter who has a relevant job opening.
(Excerpt from "6 Job Search Tips That Are So Basic People Forget Them", By Jenny Foss)