Combined Shipping
Shipping multiple items purchased by the same buyer in a single parcel to reduce total postage costs. Encourages buyers to purchase more from your store. On eBay, you can set combined shipping rules that automatically discount postage for multi-item orders.
Where you'll see this
This term is commonly used on:
ebayshopify
Put this into practice
Shopfront handles the hard parts of crosslisting and inventory sync so you can focus on finding and selling.