LinkedIn is a professional networking platform with over 950 million members worldwide. It was founded in 2002 and launched in 2003, and has since become the largest professional network. Under current CEO Ryan Roslansky, LinkedIn generates revenue through subscriptions, advertising, and recruitment solutions. The document outlines LinkedIn's mission to connect professionals globally and opportunities for economic growth, as well as recommendations for using LinkedIn to build expertise, network, and manage one's online reputation. Risks and competitors are also discussed.