Which tool is recommended for reviewing reporting metrics for campaigns?

Ads Manager is the recommended tool for reviewing reporting metrics for campaigns because it is specifically designed to provide detailed insights and analytics on the performance of ad campaigns across Facebook's platforms. Within Ads Manager, users can access numerous metrics such as impressions, reach, clicks, conversions, and other key performance indicators that help in assessing the effectiveness of advertising efforts. This centralized interface allows for tracking performance over time, comparing different ads or campaigns, and making data-driven decisions to optimize future advertising strategies.

In contrast, Business Manager serves as a broader organizational tool for managing multiple assets like ad accounts, pages, and the permissions of team members, but it does not focus solely on detailed campaign reporting. Ad recall refers to an audience's ability to remember seeing an ad, but it is more of a metric rather than a tool for comprehensive reporting. The engagement tracker, while useful for monitoring interactions with posts, does not provide the in-depth campaign performance metrics that Ads Manager delivers. Therefore, for specifically reviewing reporting metrics, Ads Manager is the most appropriate option.