The document discusses HTML5, which is more of a movement than a single technology. It provides an overview of what HTML5 is, including that it is a new specification that builds upon HTML, CSS3, and JavaScript. Some of the major new features that HTML5 introduces are richer semantics, a simpler doctype, multimedia elements like audio and video, the canvas element, and new form controls. It also notes that HTML5 is still being developed and implemented across browsers.