Right now, check to see that you are reading this document through your WebSite server and not as a file. Look at the URL displayed in the box above this area. If it doesn't start with http://, then you are not using the server. If needed, start your web server now, and click here to switch to server-based reading. Then, as soon as possible, check out the online documentation and the server self-test and demonstration.
This is your /index.html, your home page. It's URL is /, and unless you picked another location during setup, it is located in the \WebSite\htdocs\ directory. This directory is the "top" of your URL space (hence the url /). Note the visitor count (is won't show unless you're reading vie your server). This is a built-in feature of WebSite's server-side include (SSI) support.
Using your editor (notepad will do just fine), change this document to suit your needs, and add other documents, sounds, pictures, etc., to build the WebSite you want.