You can display testimonials on your site in lots of different ways. Here is an example of how you can set them up in a few minutes on your site. If you'd like a simple service that does this for you, then you might try: https://www.powr.io/plugins/testimonial-slider/standalone. It allows you to create a free testimonial slider and you can then use OfferingTree's "integration" feature to embed it on your homepage or somewhere else. (below are the steps to do that)
Step 1: create your free account and set your content up at powr.io (using the above link). The free account lets you have 3 free testimonials. Once you've set up your design, content, etc., then you can hit "Publish" in the upper right.
Step 2: Copy the "embed" code that powr.io gives you by clicking on "Embed Code" and then "Copy Code"
Step 3: Edit the page into which you want to place the testimonial (home page included) and add a code block as detailed in these instructions.
Step 4: Create your new "testimonial_slider" and then paste in the embed code you got from powr.io in Step 2 above into the "Integration Code" box and then hit "save"
Save the page and verify on your public site that the testimonial appear.