what is the sku on a product

what is the sku on a product refers to the Stock Keeping Unit, a unique identifier used by retailers and suppliers to track products and inventory. The SKU is a code, typically made up of numbers and letters, that is assigned to a specific product to help manage stock levels, sales, and purchases. Each product variant, such as different colors, sizes, or models, is assigned its own SKU to ensure accurate inventory management and streamline the purchasing process.