With this product-specific custom field you can enter a comment that is displayed on the product page in the description.
Note: You can enable/disable the display of the comment in the theme configuration.
You can find the "Comment" custom field in the respective product:
Tab "Specifications" ⇒ Block "Custom fields" ⇒ Tab (Set) "Products (ThemeWare® ... Pro)"
Type: Text
Technical name: twt_{theme}_{edition}_custom_field__product__comment