HOW TO: Make your site easier to navigate
The navigation of a website is important in helping visitors quickly find the content they want. It can also help search engines understand what content the webmaster thinks is important. Although Google's search results are provided at a page level, it also likes to have a sense of what role a page plays in the bigger picture of the site.
All sites have a home or 'root' page, which is usually the most frequented page on the site and the starting place of navigation for many visitors. Unless your site has only a handful of pages, you should think about how visitors will go from a general page (your root page) to a page containing more specific content.
The questions to ask are: