Model numbers are unique identifiers assigned to products by manufacturers. They help distinguish between different versions or variations of a product, such as electronics, appliances, or vehicles. For example, a smartphone may have several model numbers to indicate different storage capacities or colors. These numbers are essential for consumers and retailers, as they simplify the process of finding specific items, checking compatibility, or obtaining replacement parts. When searching for information or support, using the correct model number ensures that users receive accurate assistance related to their specific product.