This document provides an overview of Twitter and how to use it effectively for business purposes. It defines Twitter as a microblogging tool that allows users to share updates in 140 characters or less. The document then outlines best practices for setting up a Twitter profile, engaging customers, promoting products and brands, managing crises, protecting reputation, following others and gaining followers. It also provides a list of tools for managing accounts, analyzing analytics, searching tweets, posting images and finding other users to follow on Twitter.