HTML5 is a markup language recommended by the World Wide Web Consortium (W3C) for structuring and presenting content for the World Wide Web and a core technology of the internet used in Mobile Application Development, Enterprise Mobile Applications, developing Gaming Application Software( High performance 2D/3D graphics, offline asset storage, rich audio APIs and socket-based networking).
This is a new kid on the block. All cool applications and websites are created using HTML5. Following its immediate predecessors HTML 4.01 and XHTML 1, it has come up with additional features like new elements, attributes, CSS3 support, local SQL databases, better error handling and much more. This is a front- end technology. HTML5 is handy in doing web based mobile applications also. HTML5 has a very unique feature that it is portable, one application developed for PhoneGap will work on Sencha, Titanium as well. You don't have to change the programming again and again.
HTML5 can give mobile users the same kinds of interactive experiences, games, drag-and-drop capabilities, and rich media experiences they’re used to on their computers.