This passage is an example of a testimonial. Harold Birk gives personal evidence of how the "Hair There!" product helped to change his life. What is one advantage of using a testimonial to sell a product?

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Explanation:

Testimonials are referred to as written or recorded statements which shows the credibility of a particular company or strengthen ones reputation by showing a certain level of trust or support towards ones business.

Testimonials are vital in selliya product as they show that previous customers who have used ones product like it and this can encourage new customers to test such products. They establish trust and.csn be used to increase sales.

answer: sure

explanation: i'd love to know everything but that burden is too much to bare.