LinkedIn is a social media platform for professional networking. It was founded in 2002 and launched in 2003. Most of LinkedIn's revenue comes from selling access to member information to recruiters and job seekers. As of 2017, LinkedIn had 500 million members from around the world, over 100 million of whom are active users. The document provides tips on using LinkedIn for professional and business purposes such as creating an effective company page, engaging followers, and driving marketing goals through content and advertising.