Ratings not appearing in Search engines

Hi there, I have been using this plugin for more than 4 months now, however the rating does not appear in the search engines even for a single post.

Here is the link to one of our blog post.
https://www.savvytheme.com/top-10-free-ecommerce-wordpress-themes-for-2015/

Appreciate if you could help us fix this issue.

Thanks-

https://www.ads-software.com/plugins/kk-star-ratings/