Here you can see a list of all stand-alone SKUs defined on the current site. It is recommended to manage SKUs together with associated product type documents. However, the current version of the CMS system allows you to manage product objects with unassigned product type documents (stand-alone SKUs).
You can add a new stand-alone SKU by clicking the New button above the sections tree (if the Stand-alone SKUs node is selected). Properties of already defined stand-alone SKUs can be modified in the Stand-alone SKUs user interface by clicking the Edit () icon in the Actions column. You can also delete a stand-alone SKU by clicking the Delete () icon or perform Other actions such as Clone, Destroy, Export, Backup or Restore.
More resources concerning product types can be found in Products -> Product types chapter in the Managing your store section of the E-commerce Guide.
More resources concerning stand-alone SKUs can be found in Products -> Stand-alone SKUs chapter in the same section of this guide.
Further information about products can be found in E-commerce Guide -> Managing your store -> Products.