HTML5 is the next big thing that comes to web design and development. HTML5 is the latest version of HTML, unlike it’s previous versions HTML5 has built in video and audio playback so no need for third party programs like Quicktime or Flash; it offers offline caching meaning visitors can load certain elemetns of a webpage even without an active internet connection; HTML5 is also a cleaner code which makes it easier for developers to code a website; most off all, HTML5 is cross-browser compatible. It works in Firefox, Chrome, Internet Explorer and is even optimized for mobile phone.

If that doesn’t convince you, here are some of the best examples of the features and capability of HTML5: http://www.creativebloq.com/web-design-tips/examples-of-html5-1233547