Editing your product's file description
After you've created your overall product description, it's a good idea to go to your product's checkout tab to change the attributes set up to describe your product. At the top of the page, under Product preview, you can see this information.
For example, here's a typical ebook file preview:
By clicking Add detail you can add more details about the book. Type over the grey letters to change the existing details.
Hover your mouse over a detail and click the red X to delete it.
After clicking Save changes, your changes will go live, and your product's description will now be complete.