I'm working on a site that has pages designated with a parent page. So, for example, under the main menu heading "Support Us" there are several sub pages (Levels of Support, Refer a Friend, Sponsorships). Because these sub pages are designated with a Parent of "Support Us" the url for each of these pages becomes http://mydomain.com/support-us/levels-of-support or http://mydomain.com/support-us/refer-a-friend, and so on. I'm accustomed to NOT using the parent page designation so that the urls are shorter. So, http://mydomain.com/levels-of-support or http://mydomain.com/refer-a-friend.
Is there a reason to use the parent page designation? Is there an SEO advantage.
I've been puzzling about this and would like an answer from the Expert. I appreciate your input.