Luan wants to reach shoppers who have shown interest in their products or similar products on Amazon.com. Which type of signals should they use?

The correct answer is Retail interactions because retail interactions refer to behaviors that shoppers exhibit while browsing and engaging with products on Amazon.com, such as product views, additions to the shopping cart, or purchases. These interactions provide valuable insights into shopper intent and interest, making them ideal for targeting individuals who have shown interest in specific products or similar ones. By using retail interactions, Luan can create highly relevant audience segments based on actual shopping behavior on Amazon, increasing the likelihood of converting these shoppers. Media interactions and campaign remarketing focus more on external touchpoints or ad engagement, rather than shopper-specific behavior on Amazon itself.