HTML
HTML (Hypertext Markup Language) is any markup language that the World Wide Web Consortium (W3C) defined until 2004 and the Web Hypertext Application Technology Working Group (WHATWG) has been defining since 2004 as a standard for marking-up web documents.
HTML is one of three cornerstone webpage languages that complement each other. Among these three, (a) HTML is used to mark up a webpage, (b) Cascading Style Sheets (CSS) is used to provide multiple webpages of one or more websites with a single source of truth for their graphic elements, and (c) a programming language, JavaScript (JS), is used to create everything, especially multimedia features, that the first two languages cannot create.