You can use the Geo-based method to determine if an ad drove incremental results.
- Store-Based
- Product-based
- User-Based
- Geo-Based
The correct answer is: Geo-Based
Explanation: Google employs the Geo-based method, where experiments are designed to test incrementality using treatment and control groups. This approach avoids retroactive comparisons. By doing so, it gauges the effectiveness of ads in influencing critical business metrics such as online purchases or in-store sales.