Your personal brand is an important part of a successful career. In the current job market, your online identity (eg Facebook, Twitter, Linkedin) will almost always be checked by a prospective employer. If you are serious about your career, you need to develop a professional profile to support your clear, competency-based resume.
If you are an industry professional, graduate or looking to promote yourself, an up-to-date Linkedin presence is essential. Forbes Magazine confirms that Linkedin is largest professional network with over 400 million members and likely to be at the top of the search results if someone googles you.