What tool provides audience summary information about the Audience Reach?

The correct answer is Facebook Ads Manager, as it provides comprehensive tools for analyzing audience reach through various metrics. This tool allows advertisers to assess the performance of their ad campaigns, including insights into how many people the ads have reached, the demographics of those reached, and engagement levels. By utilizing these features, marketers can better understand their audience's behaviors and preferences, leading to more effective advertising strategies.

While Audience Insights primarily focuses on audience demographics and behaviors, it does not directly provide metrics on campaign reach like Ads Manager does. Page Analytics is more focused on insights related to specific Facebook pages, such as likes, shares, and other user interactions, rather than the broader audience reach metrics. The Content Hub is more about managing and analyzing content rather than audience insights. Hence, Facebook Ads Manager is the optimal choice for obtaining audience reach summaries.