YITH WooCommerce Multi Vendor allows you to turn your store into a multistore where vendors manage their own product and earn a commission on every sale.
The integration between these two plugins allows vendors to customize the content of emails generated by the plugin if the related product belongs to them.
After installing and activating both plugins, enable the option Enable Review for Discounts for vendors from the tab Add-ons available in YITH Multi vendor.
Vendors side
For complete information about YITH WooCommerce Multi Vendor plugin, please refer to the official documentation.