If you delete a site your articles are no longer available through a published URL (e.g. end-users cannot see them). However, the articles are still available In the Content Management Center of your ScreenSteps account in the All Content > All Articles section.
Navigate to Account > Site Access
Select Delete from the site action menu
Only the sites listed under Other Sites can be deleted from an account. The Primary Site cannot be deleted.
ScreenSteps requires you to type DELETE in order to confirm that you want to delete the site. Deleting a site cannot be undone.