The Bulk Upload feature on Seller Portal facilitates data upload of several product items using a .csv file. Each row in the file pertains to a unique item — a stand-alone product, a parent product, or a variant.
Item Type -
Stand-alone Products: Those items without any associated variants, just a single item product.
Parent Products: Those which have more than one associated variant.
Variants: Variations of a Parent Product.
For example, a "shirt" can vary in size and color, here “shirt” is the parent product and “shirt / size: small / color: blue” would be the variant. Similarly there can be multiple variants for any parent product.
Field Descriptions -