What aspect of ad copy is most important for building trust with privacy-conscious users?

The most important aspect of ad copy for building trust with privacy-conscious users is transparency. Transparency means being clear and upfront about how data is collected, used, and protected. An ad should clearly explain what data is being collected (if any), why it's being collected, and how it will be used. For example, instead of a vague call to action like 'Learn More', a transparent ad might say 'Learn More About Our Privacy-Friendly Service'. Avoid using manipulative language or making vague claims about privacy. Being honest and open about your data practices is crucial for building trust and demonstrating respect for user privacy.