Email Customizer for WooCommerce lets you fully customize your WooCommerce emails. Customize colors, header and footer format, add custom links, links to your social networks and any [shortcodes] using the familiar WordPress Customizer customizer interface. You no longer need to be a developer to do all this. Also you can add your own CSS code too.
Currently, setting up WooCommerce emails requires editing php and css template files, which is actually not an option for users who are not versed in coding. The plug-in developers wanted to provide you with an environment that is easy to use, gives you a preview of your settings, and can send a test email when you finish editing. This is what Email Customizer does for WooCommerce.