Definition, synonyms and related words
Abbreviation of stock-keeping unit: a unique code for a distinct salable item (product or service) for record keeping and sales tracking purposes.
"The retailer assigned a new SKU to the limited-edition sneaker to track its inventory separately from other shoe models."
In plain English: An SKU is a unique code that stores identify every single item on sale so you can track exactly what it is and how much stock there is left.
"The store has three different skus for that popular shampoo, each with slightly different ingredients and prices."