What term refers to a person or organization that uses a product or service?

The term that refers to a person or organization that uses a product or service is "Consumer." In the context of economics and marketing, a consumer is specifically someone who purchases and utilizes goods or services for personal use. This differentiates them from customers, who may buy products but not necessarily use them.

In contrast, the supplier is an entity that provides products or services, often focused on distributing goods to retailers or direct to customers. A vendor is similar to a supplier and typically refers to a seller or salesperson in a marketplace context. Understanding the role of a consumer is crucial as it highlights the importance of consumption in driving economic activity and influencing market trends. Thus, the distinction between these terms is essential for comprehending the dynamics of commerce and consumer behavior.