What is testimonial advertising?

In promotion and advertising, a testimonial or show consists of a person's written or spoken statement extolling the virtue of a product. The term "testimonial" most commonly applies to the sales-pitches attributed to ordinary citizens, whereas the word "endorsement" usually applies to pitches by celebrities.

How are testimonials used in advertising?

In marketing, the term testimonial is used to describe an advertising method in which a person offers positive comments about a product or brand. ... That's the reason why celebrities are often approached to provide testimonials, but other people can also make useful contributions in this form of marketing.