You use your caption field to write the great testimonials.
You use your caption2 field to write short testimonials.
Make sure you include no special characters.
You will not use any , # ! " _ ( ) * & or any other character. Keep caption 2 very simple.
It is a teaser to get them to ready more!
Here in the caption2 field you will notice that each testimonial is listed with quotes around the remark. At the end there is a comma
"I love this store",
The very last testimonial however does not have the comma.
You can easily add more testimonials following the above.