Commerce involves the exchange of goods and services between entities. E-commerce refers specifically to commerce conducted electronically over computer networks like the Internet. It allows buyers and sellers to connect directly, reducing costs. While traditional commerce involves manufacturers, distributors, wholesalers and retailers before reaching customers, e-commerce can connect businesses and consumers directly. The main types of e-commerce are business-to-business, business-to-consumer, business-to-employee, and consumer-to-consumer.