A Web Server is a software application that serves web pages to users over the internet. One popular web server is IIS (Internet Information Services), developed by Microsoft. It allows users to host websites and manage web applications on Windows servers, providing features like security, performance monitoring, and support for various programming languages. IIS supports multiple protocols, including HTTP and HTTPS, enabling secure data transmission. It also integrates with other Microsoft technologies, such as ASP.NET, making it easier for developers to create dynamic web applications. Overall, IIS is a robust solution for hosting and managing web content.