HTML5 has been designed to deliver almost everything you'd want to do online without requiring additional software such as browser plugins. It does everything from animation to apps, music to movies, and can also be used to build incredibly complicated applications that run in your browser.
HTML5 makes responsive web page design really simple and enables you to have a responsive website that helps the user have the precise experience across devices. HTML5 also enables you to easily add audio, video and other file formats without much effort. The language helps in cross browser compatibility and also ensures faster loading time for websites.