What report groups an audience based on acquisition date and compares behavior metrics over several weeks

Answer: Cohort Analysis report

Explanation:

Cohort is defined as the collection of people who persist related or common characteristic. Cohort analysis report is the record that is made from the cohort behavior over certain period of time.

Analysis and comparison of different behavior is done in this report to determine the state of performance i. e.-high performance, low performance or moderate performance. Analytic dimensions are used in this record making such as Acquisition date etc.