By default, the following AppStack Environment categories are available within Web Performance Monitoring.
The Category Status Summary (located to the right of each category) parses, enumerates, and displays the number of objects in a given category, emphasizing the status as indicated by the colors. The Category Status Summary can be toggled to either be displayed at all times, or only when categories are collapsed. This option exists under the Change Layout Settings drop down option.
If no objects in a category exist with a particular status, that status will not show in the summary.