This container is where you display testimonials from your past customers and clients. It’s a great way to do this, as you can use as many of these containers as you want. You can have one on a buyer information page that has buyer testimonials, the same for sellers, investors, etc.
Clicking on the container, you get the Testimonial Settings box on the right. There you enter the name and the testimonial text. Add as many as you want, and they will stack below based on the style of the container you selected. Here's another example of the other format: