IIS Express

IIS Express is a lightweight version of Internet Information Services (IIS), a web server created by Microsoft. It is designed for developers to test their websites locally on their personal computers without needing a full server setup. IIS Express allows users to run and debug ASP.NET applications easily, providing features similar to those found in the full IIS. This makes it ideal for developing web applications in a safe, controlled environment before they are deployed to live servers. It's user-friendly and simplifies the process of web development by mimicking real server behavior.