Testimonial Examples:
1- Jennifer Lopez on Twiter (https://twitter.com/JLo/status/1227653759754481664): “Guys, have you played #CoinMaster?! …”

Context: JLo is a big celebrity. I’m her fan. She is promoting a new game called CoinMaster. She persuades the audience to download the app. It’s effective because I downloaded already.

2- Jade Roller promoted by Tracee Ellis Ross
Context: I asked my co-worker if she has bought something because somebody promoted it. She told me that she only bought a Jade Roller because Tracee Ellis Ross was using it on a TV show, although previously she didn’t believe the product worked. Testimonial advertising persuaded her to buy it; however, she just used it one time.