This document discusses different approaches for using consumers to evaluate advertisements and provides evidence-based recommendations. It recommends only using surveys that ask about purchase intentions when presented with different ads (#3), and advises against focus groups (#1) and surveys about ad liking (#2). Focus groups and questions about ad liking can lead to biases and do not objectively measure persuasiveness. The best approach is experiments that assess how people respond to different ads. The document encourages applying these principles by testing consumer responses to ads within a week.