Guide pages are groups of content pages. Guide pages have a distinctive light gold header section with links to other pages in the guide.
Introduction
The pages in a guide are just standard content pages. If you add other page types to a guide they will show up in the guide listing, but won't themselves have the light gold header.
Section one
Also note that each section will automatically get a side menu with those headings in. This only appears in 'service' type sites.
Section two
The side menu floats as you scroll down the page. Clicking an item in the menu will 'jump' the user to that section.