When you have a lot of great reviews and feedback from past customers and clients, you may want to showcase them on your website. A handy plugin you can use for just that is Testimonials Widget. With Testimonials Widget, you are not just limited to testimonials, but you can also use it to showcase portfolio projects and reviews. All testimonials can include videos and images as well as text. You will also be able to filter the slideshow content by categories, tags, or post ID. These slideshows are fully responsive and you will be able to choose from carousel, fade, or slide transitions. They will be displayed with basic styling and fairly minimal options regarding how they look, however a little CSS knowledge can help you fully customize how things are displayed. Of course, there is a premium option as well for those that want more perks and support. There is a also an active online community out there which should be able to help you do certain things.
To download this plugin for your WordPress website, as well as some more information on the premium version, then be sure to head right here: https://wordpress.org/plugins/testimonials-widget/