Categories are different across each marketplace. Category Mapping allows you to set what the category chosen from Amazon will be set to in the NON-Amazon channel. Once set, it will take any other listings you add in the feature, and use these preset mappings to determine the NON-Amazon category.
This saves you time going forward by automating the process of mapping each listings category.
Select Category Mapping from the Listing drop-down menu.
You are given two options pertaining to each mapping.
1. Create an entirely new mapping.
2. Override an already existing mapping.
Select the NON-Amazon category that matches (or comes close to) your Amazon category. Then continue down the category leaf, keeping in line with the Amazon category as best as you can.
Once you have selected the final 'leaf' of the category, click Create Mapping.
That's all there is to it!