An online marketplace is a digital platform that connects buyers and sellers, allowing them to transact goods and services over the internet. These platforms provide a virtual space for various vendors to showcase their products, enabling consumers to browse, compare, and purchase items from multiple sources in one location. Examples include major platforms like Amazon and eBay, where transactions are facilitated by the marketplace provider. Online marketplaces enhance convenience for consumers and expand market reach for sellers, contributing to the growth of e-commerce.