The Last Order Status is Paid is a property that Unific updates each time we receive a order/create or order/update webhook from you storefront.
***Please note that "Paid" order statuses vary slightly in the naming convention depending on what E-commerce platform you are using. Here is the criteria that Unific is using;
(Shopify = paid, Magento = Processing, BigCommerce = Awaiting Fulfillment, WooCommerce = completed):
This Smart list is also an enrollment criteria to our Advanced Order Detection workflow.