When it comes to search engine optimization (SEO) your website's architectural design is just as important as your website's graphical design and layout. Google, Yahoo, Bing and the other major search engines sends out what they call "bots" or "spiders" that search the world wide web for website pages. A website and its pages are indexed based on good old fashioned content made up of text on a page and these "bots" find and move around the web (and your website) through links. The sites that have the most traffic are the sites that have the most original, authoratative content and internal and external links to and from it. This is not the only thing to good website architecture, but is a very important element.