The Google Customer Reviews website badge is an image incorporated on your store’s pages that will indicate your participation in the program.
The badge is used to display your store rating and link to your store ratings landing page. The badge also lets shoppers know what other customers have said about their experiences with your site.
This is how the badge will appear on your site:
For more information on how it works and what it looks like, please take a look at this article provided on the Google Customer Reviews support portal.