Which is NOT a benefit of an A/B test?

The choice identifying "Measuring total spending across multiple campaigns" is not a benefit of an A/B test because A/B testing primarily focuses on comparing two versions of a creative element to see which one performs better in terms of specific metrics, such as engagement, conversion rates, or click-through rates. The purpose of an A/B test is to isolate variables—like different headlines, images, or calls to action—to understand their individual impacts on performance.

In contrast, measuring total spending across multiple campaigns does not provide insight into the effectiveness of individual elements or strategies within a single campaign. A/B testing is more concerned with performance metrics rather than budget allocation or overall spending. It is designed to refine and improve a specific aspect of a campaign based on audience response. Therefore, while spending is an important aspect of media buying, it is not a direct benefit of conducting A/B tests.