Add hierachical breadcrumb to your Shopp webshop product pages.
By default the Shopp breadcrumb will display "the path you followed to get here". And frankly, that is what breadcrumbs are meant to do. However this means when someone enters one of your product pages using a direct link, the breadcrumb will be empty. It will just show the link back to the main Shopp page. With this plugin installed you can use breadcrumbs that show "where you are" in the hierarchical structure of categories.