Answer: True
Step-by-step explanation:
In advertising, a Testimonial is a written or spoken statement by a person who has used a product attesting to the effectiveness of said product. A Testimonial is a lot like an Endorsement except that Endorsements are testimonials by Celebrities.
While Testimonials are usually used to attract new customers, they are very effective in confirming to current customers that they chose the right product.
For example, imagine you walk into Epic Electronics to buy a computer and you see a video Testimonial by a person your age who absolutely loves the effectiveness of the product you want to buy. You would feel a bit reassured getting that product after seeing that Testimonial.