An example of a testimonial advertisement is a commercial where a customer describes her positive experience with a product, explaining why she likes it and how it worked for her. Websites that rely on customer reviews, such as Yelp and TripAdvisor, use testimonial advertisements to promote particular products or businesses.
Testimonial advertisements use statements from customers and other experts to persuade others of the product's qualities. Testimonial advertisements can be used in print, television, radio and Internet ads. Celebrity testimonials are a type of testimonial advertisement combined with an endorsement. Testimonials may not necessarily come from real customers, but may use experts or recruited customers with attractive biographical details.