The document provides an overview of e-commerce, defining it as the trading of products or services through computer networks like the internet. It outlines various categories of e-commerce, including business-to-consumer (B2C), business-to-business (B2B), consumer-to-business (C2B), and consumer-to-consumer (C2C), along with the features and practices associated with each. Additionally, it discusses the advantages, such as low entry costs and global market access, as well as disadvantages like product examination limitations and security concerns.
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