Here you can see a list of documents to which the currently edited product object (SKU) is assigned. Click Edit document () to edit the given document or click Navigate to document () to view the document on the live site. After clicking the icon in the header of the Actions column, a context menu is displayed, offering options for export of listed data to various types of files.
More resources concerning documents and their properties can be found in Developer's Guide -> Content management -> Document properties.
Further information about products can be found in E-commerce Guide -> Managing your store -> Products.