This tab shows you a graphical representation of your sales by category. Hover over a circle to see more detailed information. You can also adjust your X and Y Axis and Radius Metrics using the dropdown menus above the graph.
If the circles are too close together, you can hover your mouse above that area of the graph and use your scroll wheel to zoom in and out. You can also click and drag to shift the graph about. If you'd like to see the data in numerical form, you can click the "Export CSV" button.