Jet Category Mapping
Jet category mapping is required as category id's are necessary for you to upload to Jet. Jet has thousands of possible categories for placing your stores products, that the automatic category mapper can not be used.
To set your products categories, simply download the current category database from Jet with a list of Category ID's. Simply enter in the category ID that best fits your category and click on Set. Products that fall in categories NOT SET will not get uploaded to Jet. You can download the latest Jet Category Taxonomy here.