A. Category ranking is a feature when you are using the Power Add-on and the category manager. The rank is used to sort the categories which will affect the map marker that is used when a location has been assigned more than one category. Following the page ranking paradigm set by WordPress, the rank field is a simple numeric weighting for the categories. This extended data attribute for categories makes it easy to re-arrange the “weight” of categories for map marker selection without mangling category slugs. The lower the number, the higher the precedence for the map marker.