Matrix Report
From AgileApps Support Wiki
Matrix reports are used to organize and summarize your data, and are exceptionally well-suited for chart and dashboard views.
Orders by Source (Internet, Store, or Catalog) and by Offer (Discount, Purchase Incentive, or None).
The Matrix Report has a familiar format that you may know as a cross tabulation report (cross tab) or a pivot table. The resulting data is organized into a two dimensional grid which summarizes data (by total $, row count, or %).
The Matrix Report shows only summary information, based on the selected Row and Column Groups.
To create a Matrix Report, add one or more Row Groups and one or more Column Groups.