Name two common dynamic bidding goals in AI advertising and how they influence bid decisions.

• A. CPM and CPC; CPM targets impressions, CPC targets clicks.
• B. CPA and ROAS; CPA minimizes cost per acquisition, ROAS maximizes revenue per spend by predicting value.
• C. CTR and CAC; CTR targets clicks, CAC targets acquisition cost.
• D. CPC and ROI; CPC bids by per-click value, ROI focuses on overall returns.

Answer: (B)