What Google Analytics option can be used to track the performance of remarketing campaigns?

The option that effectively tracks the performance of remarketing campaigns is Audience Reports. These reports provide insights into the characteristics and behaviors of users who have previously interacted with your website or app, including those targeted in remarketing efforts. By utilizing Audience Reports, marketers can analyze metrics such as engagement, conversion rates, and demographics of segmented audiences that have been reached through remarketing campaigns.

Conversion Reports focus on measuring goal completions and the effectiveness of overall conversion strategies but do not specifically attribute performance to remarketing efforts. Event Reports help track specific actions users take on the website, but they aren't designed to provide insights into the performance of audiences targeted by remarketing. Behavior Flow Reports visualize the path users take through your site but do not offer in-depth analysis of remarketing campaign effectiveness. Thus, Audience Reports are essential for understanding how well remarketing campaigns are resonating with and re-engaging users.