What Commerce is
In general it means to conduct transactions online. It is considered a technological term because any kind of commerce conducted online requires a technological application behind it. From a marketing point-of-view, commerce is discussed with reference to the three big C's: content, commerce, and community. These are thought to be the three components driving the new economy.
The meaning of B2C (Business-to-Consumer)
An acronym that describes the thousands of e-commerce Web sites which sell products directly to the public (the consumer market). B2C is different from the B2B sector, and this distinction is important when comparing Web sites. Each approach has its own business model, strategy, execution, and fulfillment. NetLingo.com has a B2C component that includes selling books (including NetLingo: The Internet Dictionary) and smiley merchandise.