Nosto for Shopify supports ratings and reviews powered by Okendo. In order to begin leveraging Okendo's ratings and reviews in Nosto, you'll need to install Okendo's app for Shopify.
Once you have installed and configured Okendo on your Shopify store, you'll need to contact our support personnel who can enable the integration for you. This is a one-time operation after which Nosto begins collecting the rating and review metadata automatically. There is no additional configuration required on Nosto's end.