Website development involves creating web pages using HTML (Hypertext Markup Language) for structure, CSS (Cascading Style Sheets) for styling, and JavaScript for interactivity. HTML forms the backbone by defining the content and layout of the website. CSS enhances the design, controlling colors, fonts, and overall visual presentation. JavaScript adds functionality, enabling dynamic content like animations, form validation, and interactive features. Together, they build responsive and engaging websites that offer an excellent user experience.