Measuring their impact means focusing on emotional signals, not just clicks or impressions. Tracking when users feel calm, stressed, or excited reveals which moods correlate with engagement or resistance. Analyzing how often users dismiss or accept mood-triggered ads highlights whether relevance feels helpful or invasive. Logs of user interaction flow show where targeting aligns with real needs versus where it feels manipulative. These insights guide tuning timing, tone, and messaging so ads feel supportive instead of intrusive.