In 3PL, the sellers have control over their inventory. They might use 3PL just for packing and shipping, or for warehousing until shipping. The seller sends their products to a fulfillment center, where the 3PL manages their stock and completes the order fulfillment. On the other hand, in dropshipping, the business does not handle any inventory. They send orders to the manufacturer or supplier, who then prepares the package and sends the order directly to the customer.