A customer testimonial is a person's description of their experience with a product or service. It is like a recommendation from someone who has actually tried it.
A website might show a short quote from a customer beside their name and role. This can help new visitors understand how the product is used in real life.
Use genuine words and get permission before sharing someone's story. Do not present a paid or unusual experience as if it were typical without making that clear. Trust matters more than a polished quote.