A web developer is responsible for creating and maintaining websites and web applications. Their work includes designing website layout, writing code using languages like HTML, CSS, and JavaScript, and ensuring the site is responsive and user-friendly. They may work on front-end (what users see), back-end (server, database), or both (full-stack). Web developers also fix bugs, improve website performance, and ensure security. They collaborate with designers and clients to meet requirements. In today’s digital world, web developers play a key role in building online platforms for businesses, education, entertainment, and communication.