A section will create a folder with a basic page inside it name home. The point of the section asset is to give a quick way of adding a level to your navigation that will allow the nesting of pages. By putting pages, or other sections, within a section, they will show up underneath – and indented – the section that they are placed inside.
The nested pages and section will only show up when the user is on the home page of the parent section, or any page inside the parent section. The home page of the section then be treated as any normal basic page would be. The system name determines what will show up in the navigation.
For example, a section with the system name of some-page would show up as Some Page in the navigation. It would also create the URL to have a sub-section in it, such as: www.plu.edu/some-page/home.php.