Asubpage is a page that is stored "under" another page, and includes the parent page's name in its title, followed by "/" and the subpage's name. For example,User:Eloquence/Favorite Wikipedia quotes. When you visit a subpage, you will see abacklink (akabreadcrumb) near the top of the page back to the parent page.
Subpages can be useful for organizing and archiving project content, and for creating workspace under a user account. On a parent page, you can create a link to one of its subpages by typing[[/Name]]. If you end the link with a slash, e.g., [[/Name/]], the slashes are hidden in the output.
Articles don't have subpages. That is, subpages arenot enabled in thearticle namespace, because many articles might qualify as subtopics of more than one topic. Instead, follow articlenaming conventions and includelinks to related subjects in the text.
For the subtopic structure of subjects, seePortal:Contents/Outlines.