Go to WooCommerce > Settings > Emails to configure all notification emails that you can manage from the pluin.
Notification emails sent through the plugin are the following:
- commission status changed to pending;
- payment sent;
- new affiliate registration completed.
If you want to edit the default email HTML template, click on the button Copy file to theme.
Now, a copy of the template file has been added to the specified path, so that you can make all changes you wish, without having to edit the original code.