Nosto supports tagging the rating and review metadata. The rating value and review count metadata can be used for creating advanced recommendation rules to promote products that are well reviewed.
The rating values can also be used to show star-ratings in your recommendation and email templates.
The ratings and reviews feature cannot be toggled on or off and the ratings and reviews metadata is always tagged when available.
Once you've enabled the rating and reviews metadata, you should be able to see the new product metadata collected by Nosto.