Use Strong Testimonials Review Markup to tell search engines that your testimonials are reviews so they can show rich snippets with star ratings.
This demo shows a very common configuration: a service page and a testimonials page. The review markup includes ratings and the aggregate rating which enables the rich snippet in search results.
Screenshot of the Google index for this site on 8/17/2018:
Other common configurations:
- multiple products and services, each with their own review markup – demo coming soon
- adding review markup to the theme’s single and archive templates – demo coming soon