Magento includes, by default, integrations with the most popular shipping carriers: UPS, USPS (United States Postal Service), FedEx, and DHL (no longer shipping in the US, DHL is available in other countries). As with the payment methods, all but UPS require that you establish a customer account with each carrier in order to complete your configuration.
In addition to the common carriers, merchants can simply offer flat rate shipping costs or set up a table of rates based on weight, price, or number of items ordered. Merchants can also provide a site-wide free shipping condition, based on a minimum order amount.
Let's now explore some of the more complex configuration issues relating to shipping.