Your inventory is organized in Green Bits by Product Types, Products, and Inventory. Every item in your store will have associated Inventory, Product, and Product Type in Green Bits.
Product Types > Products > Inventory
For example, let's say your store sells concentrate cartridges (Product Type). You sell several different strains from different vendors (Products). You will receive specific quantities of Products in multiple packages over time (Inventory).
Learn more about Product Types, Products, and Inventory and how they relate to each other: