The software includes IIS Express (web server), ASP.NET (web development framework) and SQL Server Compact (relational database manager), in other words, all the tools necessary. The contents that you develop with WebMatrix can be exported to Visual Studio or SQL Server.
The system that it uses makes it a lot easier to create websites. The components are the same that the site will launch on the Internet, thus being able to reach the final product in a very easy way. Furthermore, WebMatrix guarantees that everything will work properly.
Code editors and databases, server and web management, search engine optimization, FTP publications... There are many options available, and they allow all kinds of users no matter what preparation they have to use the tool.
If you're looking for a program with which you'll be able to create websites, and you don't want any kind of complication, try out WebMatrix, a software program that includes everything you need, and free of charge.