The legend instructions tab in the Bulk Upload template should provide insight into how to populate each field of our product listing creation template. You can find the Enterprise version of the template, along with instructions, here: Bulk Upload Template File
Feel free to reference our Tutorial Video, which walks through FAQ's associated with our product listing creation fields as well: https://www.loom.com/share/faf894382aee4db699bb24a9926a779a