Context

Marketing teams often start campaign reporting in Google Sheets or Excel, but interviewers want to know whether you can structure the data model cleanly and translate that logic into SQL.

Question

Explain how you would build a tracking model in Google Sheets or Excel to monitor campaign efficiency. Your answer should cover:

1. What columns and tabs you would create
2. Which core efficiency metrics you would calculate
3. How you would structure the data so it can later be analyzed in SQL
4. Common mistakes that make campaign tracking unreliable

Scope guidance

Keep the answer practical. Focus on a simple but scalable model for campaign-level performance tracking, including inputs, calculated fields, and reporting outputs. You should also explain how spreadsheet formulas and pivots relate to SQL concepts such as filtering, grouping, and aggregation.