Shipping details can be configured from Zed backend application and are being managed by the Shipment module. Zed enables the basic operations (Create/Update/Delete) for carriers and it allows to update the list of shipping methods assigned to each carrier.
Shipping Carrier - company that provides shipping services ( e.g. DHL, FedEx)
Shipping Method - shipping service provided by the carrier ( e.g. DHL Express Delivery, DHL Standard )