Parents can be organized by forming parent-child relationships, which is helpful if you have created dozens of pages on a few different topics. For example, if you have created a page on Greece, and another page on Greek economics, you may want to have the economics page to be a child, or subsection, page of the Greek page. While you edit the economics page, look for the Page Attributes section, and choose Parent, the choose the Greek page from the dropdown menu.
After doing this step, you can more easily find your content from your Dashboard/Pages/All Pages view.