Drop-shipping is a retail fulfillment model where the vendor ships products to customers on behalf of the retailer. The customer places an order with the retailer and then the retailer in turn places an order with the vendor. The product is then shipped to the customer straight from the vendor. The retailer never sees it.
Venzee works for both drop-shippers and non-drop-shippers. Venzee doesn't care if the vendor or the retailer ships the order. In both cases the Venzee user will need to update the order on his/her eCommerce platform with the shipping information.