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.
Magento Commerce 2.0 offers a range of security and privacy capabilities that meet legal requirements and industry guidelines for online merchants. Some are mandated by the payment card industry, and others are required by law, depending on your location.