HTML5 is the fifth and latest version of the Hypertext Markup Language (HTML), the standard markup language for creating and structuring web content. HTML5 was developed by the World Wide Web Consortium (W3C), and was designed to improve the functionality and capabilities of web content, and to make it more interactive and responsive. HTML5 introduces new elements and attributes, as well as new APIs, for creating and controlling multimedia content, such as audio, video, and animation. It also introduces new features for semantic markup, such as new elements for representing different types of content, and new attributes for describing and linking content. HTML5 is supported by all modern web browsers, and is often used in conjunction with other technologies, such as Cascading Style Sheets (CSS) and JavaScript, to create dynamic and interactive web content.