Q8: An advertiser has launched a Value-Based Optimization (VBO) campaign. Which metric is BEST to evaluate campaign performance?

Options:

1. CPM (Cost Per Mille)
2. ROAS (Return on Ad Spend)
3. CTR (Click-Through Rate)
4. Impressions

✅ Correct Answer: B — ROAS (Return on Ad Spend)

VBO optimizes for users predicted to generate higher purchase value. ROAS directly measures revenue per dollar spent, making it the most relevant metric for VBO campaigns.

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