Model numbers are unique identifiers assigned to products, typically by manufacturers, to distinguish different versions or variations of a product. They often include a combination of letters and numbers that can indicate features, size, or production year. For example, a smartphone model number might reveal its generation and storage capacity. These numbers help consumers and retailers identify specific products, making it easier to find compatible accessories or replacement parts. When searching for information or support, using the correct model number ensures that users receive accurate details related to their device or appliance.