A web developer intern typically assists in various stages of website and web application development, from conception to deployment. Responsibilities may include writing code in languages such as HTML, CSS, and JavaScript, testing and debugging applications, and collaborating with other team members. The role requires a good understanding of web standards and development best practices, as well as the ability to learn and apply new technologies. Education in computer science or a related field is often preferred, along with relevant skills and experience in web development tools and frameworks.