Please follow the below steps to configure Testimonial Section

•  Go to Appearance> Customize>Homepage Settings> Testimonial Section
• Check Enable Testimonial Section to display it on the Homepage.
• Enter Testimonial Section Title  and Testimonial Section content.
• Select the category of the Posts to display on the Testimonial Section. The Posts title under the selected category will appear as the customers’ name and the respective featured images of the Posts will be displayed under the section.  
• Click Save and Publish.