HTML is a simple language to learn. You can master enough HTML in a few hours to be able to create a basic Web page, but there is much more to learn if you want to take it further.
The web browser reads the plain text (ASCII) HTML file and coverts it (renders it) to your screen. HTML uses special "tags" or codes that the browser software understands, there are two rival browsers in use; MicroSoft's Internet Explorer (IE5) and Netscape Navigator. Most tags works on both systems but some tags only work on one!