When the meal-kit delivery company HelloFresh wanted to promote its latest line of healthful menu items, it made an increasingly popular choice: It hired an Instagram lifestyle influencer. Jenna Kutcher is a Minnesota-based mother of two who has more than a million followers, and as part of a 21-day challenge, she and 15 other influencers hired by the brand posted recipes and photos of meals they made using HelloFresh, each tagged #RefreshWithHelloFresh. The campaign produced 461 influencer posts and generated 5.5 million impressions, with 20% of the influencers’ followers mentioning HelloFresh on Instagram—a clear success.

A version of this article appeared in the May–June 2024 issue of Harvard Business Review.