The Category Edits tool counts and lists contributions a user made within one or more categories.
The Summary section shows a comparison of how many edits the user made and in the given category and to all other pages. If multiple categories are given, it also shows a breakdown for each category and a pie chart comparing the percentage of edits to those categories.
This section lists the edits the user made to the given categories. There is pagination so you can browse through older edits.