This presentation defines e-commerce and outlines the key types and benefits of e-commerce. There are four main types of e-commerce: business to business (B2B), business to consumer (B2C), consumer to business (C2B), and consumer to consumer (C2C). E-commerce provides benefits like low costs, global access, and 24/7 buying and selling. However, there are also disadvantages such as inability to examine products personally and risk of credit card theft. Overall, e-commerce has evolved to create more competition and faster transactions between customers and businesses online.