Crosstab reports allow you to look at the combination of multiple Groupings and Measures to look for particularly meaningful combinations within your data.
In this example, you can see how much new business each sales representative has generated for each month of the year.
Within the report editor, you can drag groupings into the Row drop area and they'll appear along the vertical side of the report. Drag groupings into the Column drop area and they'll appear across the report horizontally. Finally, add measures to the the Measure drop area to choose just what numeric value you're evaluating in the crosstab.
The following properties are set in the Report Editor -> Configuration -> Report Properties -> Formatting.
The following properties are set in the Report Editor -> Configuration -> Report Properties -> Color Scheme.