Magento 2.0.18 is the final 2.0.x release. After March 2018, Magento 2.0.x will no longer receive security patches, quality fixes, or documentation updates. To maintain your site's performance, security, and PCIPayment Card Industry: Refers to debit and credit cards and their associated businesses. compliance, upgrade to the latest version of Magento.
In this section of the guide, you will learn about each stage of the order workflow, and how to process orders, create invoices, and shipments. You will also learn how to issue credit memos and store credit, and RMAs for returned merchandise.