HTML (HyperText Markup Language) is the standard markup language for documents designed to be displayed in a web browser. It defines the meaning and structure of web content.
It's the fundamental building block of web pages. HTML elements are the building blocks of HTML applications. For example, a paragraph element will be displayed in a browser as a paragraph. This can be with or without the HTML minor tag, but the tag itself cannot be omitted.
CSS (Cascading Style Sheets) is a style sheet language used for describing the presentation of a document written in a markup language like HTML. CSS describes how elements should be rendered on screen, on paper, in speech, or on other media.
CSS can be used to control the layout, colors, fonts, and overall appearance of a website. It separates the content from the presentation, making websites easier to maintain and update.
JavaScript is a programming language that enables you to create dynamically updating content, control multimedia, animate images, and pretty much everything else on the web. It's one of the core technologies of the World Wide Web, alongside HTML and CSS.
JavaScript allows for interactive elements, complex animations, and sophisticated user interfaces. It runs in the user's browser, making web pages more engaging and functional.