A web developer is a professional responsible for designing, coding, and maintaining websites and web applications. They play a crucial role in bringing a website's visual design and functionality to life, using programming languages such as HTML, CSS, and JavaScript. Web developers collaborate with designers and clients to ensure the website meets both aesthetic and functional requirements. They may specialize in front-end development, focusing on the user interface and experience, or back-end development, handling server-side processes and databases. Continuous learning is essential for web developers to stay updated on evolving technologies and trends in the dynamic field of web development.