Technique

Testimonial and endorsement

Ads in which a person vouches for the product: a celebrity, an athlete, an expert or an ordinary customer.

1891–2022Updated 6 October 2026

2020s

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1970s

1910s

1890s

Testimonial and endorsement: how it works

A testimonial ad uses a person to vouch for the product. That person might be a celebrity, an athlete, an expert or a satisfied customer. It is one of the seven propaganda devices popularised by the Institute for Propaganda Analysis in the late 1930s, and it is still taught as a way to read advertising critically.

How to spot it

  • A recognisable face or voice is the reason to pay attention.
  • The endorser's qualities (talent, toughness, honesty, cool) are meant to rub off on the brand.
  • The best examples give the star something surprising to do rather than simply reading a script.

Why it works, and the risks

Fame buys attention and borrowed trust. The danger is that people remember the celebrity and forget the brand, or that the endorser's later reputation drags the brand with them. The examples below show how the strongest ads make the star serve the idea.