XAML Browser Applications, or XBaps for short, are computer programs that can run inside a special type of web browser called Internet Explorer.
A computer program is like a group of instructions that tell your computer what to do. These instructions are called code.
XBaps are written using a special language called XAML, which stands for eXtensible Application Markup Language. Think of XAML as the way you can write down what you want your computer program to look like and how it should behave.
When you open an XBap in Internet Explorer, the computer reads the XAML and turns it into a program that you can interact with. This means you can use the program just like any other computer program, but it's running inside your web browser.
XBaps are different from regular web pages because they can do more things like interact with your computer's hardware, store data on your computer, and show animations. This makes them useful for situations where you need a more sophisticated application to run in a web browser, like a game or a video editing program.
So, in summary, XBaps are special computer programs written in a language called XAML that run inside a web browser and can do more things than regular web pages.