Goods category is an obligatory goods property that allows reports filtering and grouping.
Goods categories dictionary looks as follows:

The Goods (by default) category is the only preinstalled category. When importing goods from r_keeper 7, the preinstalled category will be inserted into the cards of new goods.
If in QushMan.exe the setting to fill goods categories with values from r_keeper, then r_keeper categories will be added to the Goods categories dictionary.