3rd party shipper refers to a logistics company that handles shipping and delivery on behalf of another company. Third-party shippers can manage the entire shipping process, from packaging and warehousing to the actual shipment and tracking. Companies that specialize in 3rd party shipper services include FedEx, UPS, DHL, and various fulfillment centers. Using a third-party shipper is often beneficial for e-commerce businesses or sellers who need to streamline their shipping operations and focus on other aspects of their business, like sales and marketing. This allows businesses to access a larger shipping network without having to handle logistics themselves.