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 PCI compliance, upgrade to the latest version of Magento.
The Themes chapter provides all information, including theoretical concepts and practical references, a frontend
developer might need to efficiently create a new theme
in Magento application.