Product model numbers are unique identifiers assigned to specific items by manufacturers. They help distinguish between different versions or variations of a product, making it easier for consumers to find the exact item they need. For example, a smartphone may have several model numbers to represent different colors, storage capacities, or features. These model numbers are often found on the product packaging, user manuals, or the product itself. They play a crucial role in inventory management, warranty claims, and customer support, ensuring that both consumers and retailers can accurately reference the correct product when needed.