LinkedIn is a professional networking site you can use both during a job search and to stay connected with colleagues, classmates, professors, and more.  LinkedIn has more than 225 million users in over 200 counties and is the most important online networking tool for both job seekers and recruiters.  Your LinkedIn profile is like your resume on steroids, offering greater interaction and acting as your online portfolio.  It’s a summary of your professional background that is designed to attract recruiters, networking contacts, and grad schools.