The document provides an overview of the professional networking platform LinkedIn. It discusses LinkedIn's large user base of over 347 million members in over 200 countries. Three-quarters of new members come from outside the US, and recent college graduates are LinkedIn's fastest growing demographic. The document also lists several LinkedIn tools and apps that can help users boost their professional profile, including LinkedIn Connected, LinkedIn Job Search, LinkedIn Pulse, and LinkedIn Sales Navigator. It provides tips for creating an effective LinkedIn profile and engaging with connections on the platform.