The document provides an overview of new features in HTML5 including new tags, attributes, JavaScript APIs, forms, validation, audio, video, SVG, and canvas. It discusses changes to old tags and introduction of new semantic tags. Specifically, it describes new media tags for audio and video, form elements like input types for numbers, dates and files. It also compares the canvas and SVG elements, providing examples of each. The goal of HTML5 is to enable rich applications using HTML, CSS, DOM and JavaScript across platforms.