An Advanced Diploma in Web Development is a program that teaches the advanced skills needed to design, build, and maintain websites and web applications, covering front-end (like HTML, CSS, JavaScript) and back-end (server-side programming) development, database integration, and UI/UX design. These programs often include hands-on projects and prepare graduates for roles like Front-End Developer, Back-End Developer, or Full-Stack Developer. The duration can vary, with some programs lasting around 10 months to two years, and they may be offered in online or offline formats.