Every product on Amazon has one browse node to help customers that are either searching or browsing for a type of product. For example, a pair of sneakers could have the browse path:
Clothing, Shoes & Jewelry > Men > Shoes > Athletic
A product category determines what restrictions may be placed on selling products in that category as well as fees.
For customers, this represents the navigation path on the website.
You can save time when you need to change the category of multiple products by uploading an Inventory File.