It is the fifth revision of the HTML standard (created in 1990 and standardized as HTML4 since 1997) and is in development since October 2011. Its main objectives were to improve the language with support for the latest multimedia issues while maintaining the readability of people and well understood by computers and devices (web browsers, parsers, etc.).
It includes detailed processing models to encourage more interoperable deployments; expands, improves and streamlines web document availability and introduces markup and application programming interfaces (APIs) for complex web applications. For these reasons, HTML5 is a potential candidate for mobile platform applications. Many features of HTML5 have been created because you will need to be able to run them on devices such as smartphones or tablets.