Bright Hub's collection of articles on HTML teach you the purpose of HTML, how to use HTML to code specific tasks, and how to create compliant webpages.
HTML stands for Hypertext Markup Language. Tim Berners-Lee first developed HTML for the purpose of linking together web pages. HTML affects the look of text, describes how links are created and the structure of a web page, including the way images appear. Many people are familiar with HTML as simple text formatting, but it has a more important purpose. Early versions of HTML were not regularized, and web page appearance was inconsistent in different web browsers. Often the informational content on the web page varied by browser, when examined by the spiders of a search engine.
The W3C is working with the draft standard HTML5 to provide web standards across the World WIde Web. This will emphasize the semantic components of web pages, allowing for consistent machine readable content, which will improve the ability of search engines to find and relate information.
Wikipedia image sample HTML code by Dreftymac cc