This document discusses how Twitter can be used for various health-related purposes such as discovering health news and legislation, tracking health metrics like exercise, blood sugar, and dieting, providing support for issues like smoking cessation and personal crises, and facilitating education through curating health information feeds. Twitter allows sharing information in real-time and connecting with others around health topics, diseases, and current events. The document also lists several tools that integrate with Twitter to enhance its functions for both personal health and professional medical uses.