This document discusses the benefits of using HTML5 for web and mobile development. It provides 15 reasons for businesses to use HTML5, including that it allows writing code once that can run on any device, enables responsive design for different screen sizes, is optimized for the growing mobile market, and controls development costs. HTML5 offers features like location awareness, accessibility, video playback, and enterprise capabilities that rival native apps. It is supported by a large open source community and major companies, and is the fastest evolving web platform.