Turning to psychology can help. Appealing to consumers’ emotions and desire for connection with others are often powerful marketing strategies, as long as they’re not interpreted by consumers as manipulative. Introducing novelty, too, can be effective—research shows that consumers respond to surprising ads, humorous ads, or even “experiential” ads (such as parties or events designed to promote a product). Repeating an ad enough times so that a consumer remembers it—but not so much that they become frustrated—is also a critical part of any effective ad campaign.