• Campaign experiments randomly chooses how much Search traffic will be diverted to an experiment, guaranteeing statistically significant results.
• Campaign experiments are used to test Google Ads campaigns against traditional media campaigns, like TV or print ads.
• Campaign experiments allow marketers to measure the impact of campaign changes and revert back to original campaigns, if needed.
• Campaign experiments can help marketers understand whether proposed changes help reach their desired marketing objective.

The correct answer is: Campaign experiments can help marketers understand whether proposed changes help reach their desired marketing objective.

Explanation: Campaign experiments serve as a valuable tool for retailers to test potential changes and optimizations in their campaigns. They can create a new experimental campaign to test changes and interpret the results to understand their impact on reaching marketing objectives. The modifications can range from Smart Bidding strategies, match types, to account structure and asset types. This method provides insights into the effectiveness of proposed alterations, allowing marketers to strategically implement those which improve the campaign’s performance.