Hootsuite is a social media management tool that allows users to schedule and post updates to multiple social media accounts like Facebook, Twitter, LinkedIn from one place. The document provides step-by-step instructions on how to set up a Hootsuite account, connect social media profiles, add streams to organize accounts, and schedule posts to multiple networks. Key features explained include the ability to upload images, add links, target audiences, and let Hootsuite autonomously determine the best times to post updates based on follower behavior.