HTML5 Introduction. HTML5 is a programming language whose acronym stands for Hyper Text Markup Language. It is a system that allows the modification of the appearance of web pages, as well as making adjustments to their appearance. It also used to structure and present content for the web.
With HTML5, browsers like Firefox, Chrome, Explorer, Safari and more, can know how to display a particular web page, know where the elements are, where to put the images and where to place the text.
Apart from HTML5, there are other languages that are necessary to give format and interactivity to a site, but the basic structure of any page is first defined in the HTML5 language.