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What are the different types of e-commerce sites?
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1.  B2C (Business to Consumer): This type of e-commerce site is designed for businesses and consumers, allowing users to browse products or services offered by a single company.
2.  B2B (Business to Business): This type of e-commerce site is designed for businesses to sell their products or services to other businesses.
3.  C2C (Consumer to Consumer): This type of e-commerce site is designed for individuals to buy and sell products or services with each other.
4.  C2B (Consumer to Business): This type of e-commerce site is designed for individuals to buy and sell products or services with businesses.