What does this do?

Hi
This plugin is intended to give you an easy way to include product thumbnails and categories in your Woocommerce emails. It also provides a mechanism for previewing the emails using actual orders instead of blank data, or creating fake orders purely for testing your emails.
If you want to alter the actual textual content of the emails, you can still use this plugin for thumbnails and categories, but you will need to copy the individual email templates into your theme’s woocommerce folder and alter the text there.