A Web Developer is a professional who designs, builds, and maintains websites and web applications. They work with programming languages such as HTML, CSS, and JavaScript to create user-friendly and visually appealing websites. Web developers ensure that websites function properly, load quickly, and provide a smooth user experience across different devices and browsers. They may specialize in front-end development (what users see), back-end development (server-side logic and databases), or full-stack development (both front-end and back-end). Web developers also troubleshoot issues, update content, and improve website performance over time.