A site guide is a an important part of a website, it is a page containing links to every page on the website, this is important for two reasons. Firstly it makes navigation of the website a simple and lets users see every single page in one place meaning they may visit pages that they may not necessarily have know were there otherwise. The other reason is that the search engines really like them as it makes finding all the pages on your site easier. Check out our site guide to get a better idea.