The term "aftermarket" refers to the secondary market for products and services that are sold after the original sale. This includes parts, accessories, and services that are not provided by the original manufacturer. For example, in the automotive industry, aftermarket parts can include replacement tires, custom rims, or performance upgrades that enhance a vehicle's functionality or appearance. Aftermarket products can be beneficial for consumers looking for alternatives to original equipment manufacturer (OEM) items, often at a lower cost. However, the quality and compatibility of aftermarket products can vary, so it's important for buyers to research and choose reputable brands to ensure satisfaction and safety.