What marketing technique uses famous personalities to promote a product?

The correct answer is the use of celebrity endorsement, a marketing technique where well-known personalities are engaged to promote a product. This approach leverages the celebrity's popularity and public image to influence consumer behavior and enhance brand awareness.

When a celebrity endorses a product, they bring their own credibility, charisma, and followership, which can significantly increase the appeal of the product to potential customers. The association of a trusted or admired figure with a product can lead to increased sales and a positive image for the brand.

In contrast, brand ambassadors represent the brand more broadly and may not necessarily be celebrities. While they can be effective, the focus is more on consistent representation rather than high-profile endorsement. Influencer marketing, on the other hand, targets individuals with a significant online presence, but these influencers may not always be traditional celebrities. Guerrilla marketing is a different strategy altogether, focusing on unconventional methods to engage consumers and create buzz around products rather than relying on famous faces.