HTML5 is currently under development as the next major revision of the HTML standard. Like its immediate predecessors, HTML 4.01 and XHTML 1.1, HTML5 is a standard for structuring and presenting content on the World Wide Web. The new standard incorporates features like video playback and drag-and-drop that have been previously dependent on third-party browser plug-ins such as Adobe Flash, Microsoft Silverlight, and Google Gears.
HTML5, the next version of the markup language used to build Web pages, has attracted attention for its ability to show video inside a Web browser without using plug-ins, such as Adobe’s Flash. But lesser-known features could ultimately have a much bigger impact on how users experience the Web.
Experts say that what HTML5 does behind the scenes–such as its network communications and browser storage features–could make pages load faster (particularly on sluggish mobile devices), make Web applications work more smoothly, and even enable browsers to read older Web pages more easily.