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HTML stands for HyperText Markup Language. It is the standard markup language used to create and structure content on the web.

HTML elements are represented by tags, which label pieces of content such as headings, paragraphs, links, images, and more.

CSS stands for Cascading Style Sheets. It describes how HTML elements should be displayed on screen, on paper, or in other media.

CSS saves a lot of work by controlling the layout of multiple web pages all at once.

JavaScript is a versatile programming language that enables interactive and dynamic behavior on websites. Here are some reasons to use it:

• Add interactivity to web pages
• Handle events like clicks, hovers, and form submissions
• Manipulate the DOM to update content dynamically
• Communicate with servers using AJAX and Fetch API
• Build full-stack applications with Node.js

Web accessibility ensures that websites and web applications are usable by everyone, including people with disabilities. Key practices include:

• Use semantic HTML elements
• Provide alt text for images
• Ensure sufficient color contrast
• Make all functionality available via keyboard
• Use ARIA attributes when necessary