Which KPI trio would you monitor to assess sales growth while keeping costs in check?

• A. Impressions, Clicks, CTR
• B. Revenue, ROI, AOV
• C. Conversions, Conversion Rate, Cost Per Acquisition
• D. CPC, CPM, Frequency

Answer: (C)

To grow sales while keeping costs in check, you want metrics that show what happened, how efficiently it happened, and what it cost. Conversions tell you how many sales occurred, directly signaling sales growth. Conversion rate shows how effectively your traffic turns into those sales, so you can optimize the funnel and lift performance without simply driving more visits. Cost Per Acquisition reveals how much each sale costs, helping you control spend and maintain profitability. Together, these three give a clear view of growth, efficiency, and cost control, enabling you to scale smartly. Impressions, clicks, and CTR focus on awareness and engagement but don’t reveal actual sales or cost per sale. Revenue, ROI, and AOV relate to revenue and profitability but don’t directly track how much you’re spending to acquire each sale. CPC, CPM, and Frequency cover ad delivery costs rather than the outcomes of those costs in terms of actual sales.