To embed testimonials on posts and pages, first activate the Testimonial custom content type on your site and add some testimonials.

Next, add the 

To embed testimonials on posts and pages, first activate the Testimonial custom content type on your site and add some testimonials. Next, add the  shortcode to a post or page. The shortcode will display testimonials in different ways, depending on how you use the optional attributes to customize the testimonials layout.

Testimonials Shortcode
 shortcode to a post or page. The shortcode will display testimonials in different ways, depending on how you use the optional attributes to customize the testimonials layout.