This document provides guidance on developing a business using LinkedIn. It emphasizes that LinkedIn is the most important professional social network and that social media are just tools - the strategy behind their use is what really matters. It outlines risks and opportunities of using social media for business and provides a 4-step process for building an online presence: 1) sign up, 2) complete your profile, 3) build your network, and 4) join relevant groups. The document stresses engaging with your network through participation and influence rather than just observing passively.