This field is to write about your policies IF you accept them.
For instance: You accept returns so in this field you would possibly state how long and your terms. Example: Returns accepted within 14 days, must be in original packaging and tamper evident seal must be intact. Returns are only given for the product price itself and not shipping costs.
We make it easy to add these terms when listing a product. Why? Because you might want to allow a refund for some products and not others, it's up to you!