What is a subpage in WordPress?

The only difference between a page and a subpage is that a subpage contains it’s parent in the URL, as will any pages that sit as children to the child page…

For illustration.

Regular page:
example.com/a-page/

Subpage:
example.com/a-page/a-child-page/

Sub Subpage:
example.com/a-page/a-child-page/another-child/

and so on…

Aside from the URL there’s no other differences i can think of.

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