HTML is used to define web pages by using "tags" and "attributes". Tags are the programmatic commands the appear between < > symbols.
The regular structure for an HTML document contains this kind of tag appearance: <HTML><HEAD>(Welcome to my web page)</HEAD><BODY> (hundreds of lines of text go here) </BODY></HTML>.
The single biggest feature of HTML is the ability to 'hyperlink' (jump) the reader to any other web page on the Internet. Hyperlink tags look like this: <a link="http://www.about.com">Jump to About</a>
For more information on HTML, please visit the About Webdesign web site.