Testimonial link

Hello Lucy,
Anything added to your site needs to be added from inside the Sitebuilder, so it's not actually possible for your site visitor to add a testimonial directly to your site. What I would suggest is that you add a contact form to your site where your site visitor could write a testimonial and send it to you, then you can add it to the site. Here is a link with more information: Adding the Yola Form Widget.

I hope this information is helpful!

Kind Regards,
Emmy