Testimonial
In any sales business, the more people that know about your product the more profits you are going to earn. The most effective way to make people know about how good your product is now by advertising, but it is when people buying your product also tells other people about your product. Some people call it, testimonial sales. An example is watching movies and finding it great movie, you immediately share it to your friends. Often times, people watch the movie because they heard from a friend that it is a great movie. In sales, we make the customer sell your product by providing a great service.