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’ll learn how to import and export data, manage security and permissions, install extensions and integrations, and use the many tools that are available to maintain your store at peak performance.