Offering free shipping on your shop is a fantastic way to find more buyers and encourage higher dollar orders!
To create a free shipping offer:
Navigate to the account page on the app
Select "My Discounts and Offers"
Click "Discounts and Free Shipping" Here, you can set a minimum free shipping amount.
Setting a free shipping minimum will make it so that you will cover shipping costs for orders that total over the amount specified. The free shipping offer will be displayed on your shop page and all your individual listings, which will encourage folks who were maybe only going to buy one book to buy multiple books from you when placing an order.
After a qualifying order has been placed, you can ship the book or books as you normally would. After delivery, the associated shipping costs will be deducted from your final payout on the order.
For more general info on shipping on Pango, see this article.