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.
Before you add products to your catalog, you must first establish the basic categoryA set of products that share particular characteristics or attributes. structure of your catalog. Every product in your catalog must be assigned to at least one category. The top navigationThe primary group of web page links that a customer uses to navigate around the website; the navigation links to the most important categories or pages on an online store. of your store reflects the category structure of your catalog.