HTML (HyperText Markup Language) is the standard markup language for documents designed to be displayed in a web browser. It defines the structure and semantics of web content.
CSS (Cascading Style Sheets) is a stylesheet language used to describe the presentation of a document written in HTML. CSS describes how elements should be rendered on screen, on paper, in speech, or on other media.
JavaScript is a programming language that enables interactive web pages. It is a core technology of the World Wide Web, alongside HTML and CSS. It allows for dynamic content updates, control multimedia, animate images, and much more.