How do I show ratings on Google ?

I haven’t used this plugin, but you can try Rating Manager by Elementous. It supports Rich Snippets based on the current page rating.

This plugin need some changes, it needs to be in microdata way
https://developers.google.com/structured-data/rich-snippets/reviews

visualworker,

Rich Reviews does use microdata schema. This was updated back in version 1.6.0 the read me simply is out dated. The read me will be updated in the next push. If you are having trouble getting reviews displayed on Google I would recommend to make sure that your Rich Settings in the options tab are set the way that you want them to be, and go ahead and take a look here: https://developers.google.com/structured-data/testing-tool/ to see what google is finding on our web page. Let me know if you are shown any errors.

Thanks,
Charlie Maxwell
[NM_Developer]