The document defines e-commerce as the use of the internet for the purchase and sale of goods and services, including support after the sale. It outlines the key differences between e-commerce and traditional commerce, noting that e-commerce uses internet technology for automated processing of transactions while traditional commerce relies on in-person, phone, or mail interactions. The benefits of e-commerce are described as market expansion, reduced costs, improved customer service and increased productivity for organizations, as well as convenience and choice for consumers. Limitations include lack of security, reliability issues due to rapid software changes, and technical infrastructure requirements for vendors.