The Building Blocks of the Web: HTML, CSS, and JavaScript

HTML (HyperText Markup Language) is the foundational language of the web, providing the structural skeleton for every page a browser renders. It organizes content into a tree of elements — headings, paragraphs, lists, links, images, forms — each wrapped in tags that describe what the content is, not how it should look. Modern HTML5 introduced semantic elements such as header, nav, main, article, section, and footer, which replace generic div containers with tags that convey meaning about the role of a section of the page. This semantic structure matters beyond tidiness: screen readers, search engine crawlers, and browser extensions all rely on it to interpret a page correctly, making semantic markup one of the simplest and most effective steps toward an accessible, well-indexed website.