It is very simple to use, and can include such things as images and sound files. See the page on Writing Web Pages for details on HTML, as well as lots of other useful stuff. The file that is loaded by default is called index.html .
Most people edit it directly, with their favorite editor.
If you use emacs , then it should automatically take you into html-mode when you edit a file which ends in .html . Newer versions of Netscape have Composer built it - and similar features exist in other web browsers. Yet another choice is a freely available html editor that we have installed, called ashe or xhtml . That is entirely up to you. Most people include links to pages elsewhere, that contain information about their interests.