What does a campaign experiment allow you to do?

A campaign experiment is a structured approach that enables marketers to test specific changes to their advertising campaigns while holding other variables constant. This allows for a clearer understanding of how different elements impact overall performance. By isolating a particular change—such as adjusting the ad copy, targeting options, or bid strategy—while keeping everything else stable, marketers can accurately measure the effect of that change. This method is essential for deriving actionable insights and optimizing ad performance based on empirical data rather than assumptions.

The other options do not accurately convey the primary function of a campaign experiment. The ability to change multiple campaigns at once does not align with the specific purpose of a controlled experiment, which focuses on individual variables. Running experiments solely in isolation is not practical, as the goal is to analyze how changes perform in a comparable environment to the existing variables. Lastly, while performance reports are crucial for analyzing results post-experiment, campaign experiments do not eliminate the need for such reports; rather, they complement them by providing focused data for decision-making.