The UPS Shipping Rates app seamlessly integrates UPS live shipping rates into your store's shopping cart, providing accurate and real-time shipping cost information to your customers. By utilizing the UPS REST API on the back-end, it sources shipping rates from worldwide locations while ensuring that your store visitors have access to the latest cost estimates without the need for manual input. While the app does not facilitate the printing of shipping labels, it excels in transparent cost calculation, enhancing the checkout experience. The "UPS Rates" dashboard, easily accessible from the "Apps" section in the site admin menu, offers helpful resources for enabling and setting up the app correctly. Within this dashboard, store administrators can customize shipping options, including selecting preferred box sizes and adjusting pricing through markups or discounts. Additionally, businesses with negotiated rates can easily integrate their own UPS account number, allowing them to leverage customized rates to optimize their shipping costs.