All of the web pages in the Order Pipeline are hosted by Amazon so your application plays no role in purchasing the items or order fulfillment. Your application must, however, use the PurchaseURL returned by Product Advertising API cart operations to enter the shopping cart items into the Order Pipeline. The PurchaseURL is often implemented as an HTML form and button labeled, for example, Proceed to Checkout, as shown in the following figure.
PurchaseURL
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