Another way to use logos is to use facts and testimonials that back up your claims and benefits. Facts are objective and verifiable statements that demonstrate your expertise, authority, or quality. For example, if you are selling a book that teaches a skill, you can use facts such as how many copies you have sold, how many awards you have won, or how many positive reviews you have received. Testimonials are personal stories or opinions from satisfied customers that show how your product or service has helped them. For example, if you are selling a course that helps people learn a language, you can use testimonials such as how fast they have learned, how much they have improved, or how much they have enjoyed the course. Make sure your facts and testimonials are relevant, authentic, and diverse. Avoid using fake or irrelevant testimonials that might damage your reputation.