Shipping rates refer to the costs associated with sending packages from one location to another. These rates can vary based on several factors, including the weight and dimensions of the package, the shipping distance, and the chosen delivery speed. Different carriers, such as UPS, FedEx, and USPS, may offer varying rates for similar services. Additionally, shipping rates can be influenced by seasonal demand, promotional offers, and the type of service selected, such as standard or express shipping. Businesses often calculate these rates to determine the best shipping options for their customers while ensuring timely delivery.