Friendly URLs (or Marketing URLs) exist as a way to format the oft-intimidating URLs created by the CMS, such as http://www.farcrycms.org/index.cfm?objectid=A762FA21-EA69-0EC7-F9213952134B86E8, and turn them into something more palatable like http://www.farcrycms.org/go/downloads/release-notes.
The Administrator can view and delete these Friendly URLs through Manage Friendly URLs; as well as rebuild the list of all the pages on the site using the Rebuild Friendly URLs button.
For more information on the subject, go to the Friendly URL Management page in the Developer's Guide.