The document discusses various types of e-commerce models, including business-to-consumer, business-to-business, consumer-to-consumer, and others. It defines each model and provides examples. The primary types covered are B2C, B2B, C2C, B2G, C2B, G2C, m-commerce, social commerce, niche e-commerce, cross-border e-commerce, subscription e-commerce, and service e-commerce. The document notes that e-commerce continues to evolve with hybrid models and emerging trends.