Getting real-time U.S. and international shipping rates from UPS®, USPS®, and FedEx® is very important to any eCommerce websites charging shipping. There are different ways to do it: Integrate individually with each of the big shipping companies, Integrate with a 3rd party business which specialize in shipment, or use a platform that does it all for you. There are pros and cos to each option. The easiest way is via a comprehensive platform like BigCommerce. They handle important tasks such...