What is a SKU number
SKU stands for "stock keeping unit" and is a number that retailers use to differentiate products and track inventory levels. An SKU is typically eight alphanumeric digits long. Products are assigned different SKU numbers based on various characteristics, such as price, manufacturer, color, style, type, and size.
SKUs aren’t universal; they’re meant to be unique to your business and can be tailored to fit your needs or those of your vendors and customers.