Testimonial commercials are a great source of motivation for your potential customers. There are a couple of reasons for that. Firstly, you can show your past experiences of how your product and services have helped your previous clients, and it boosts your credibility. The best part about testimonial commercials is that these videos cannot be faked. Examples of best testimonial commercials are the videos of Phelps Agency, Amazon, Dropbox, and Google Adwords.