As you can guess, we are going to needa plugin. A handy plugin called Easy Testimonials ...

Here it is:

https://wordpress.org/plugins/easy-testimonials/

And this time I can't say that is a "tiny" plugin ... Actually it's a quite big 2.3 MB plugin, so before anything else, let's see the usual speed tests ...

Here are my results before installing the plugin ...

... and the result after installing and activating the plugin:

Which means an additional 30 ms ... In other words, 0.03 second ... So i'ts not a tiny plugin, but is definitely a well-coded plugin! A 0.03 second additional loading time is literally imperceptible ...

With that having said, let's see how it works ...