B2C (Business to Consumer) commerce refers to the buying and selling of products or services between a business and individual consumers. In this type of commerce, businesses market and sell their products directly to consumers through various channels such as physical stores, online stores, or mobile applications. The transaction is typically smaller in scale and involves a higher number of individual customers.

B2B (Business to Business) commerce, on the other hand, refers to the buying and selling of products or services between two or more businesses. In this type of commerce, businesses sell their products or services to other businesses, which may use them as raw materials, components, or for resale. The transaction is usually larger in scale and involves fewer customers, but the value of each transaction is generally higher.

In B2C commerce, the focus is on satisfying the individual consumer's needs and preferences, while in B2B commerce, the focus is on meeting the specific requirements of other businesses. B2C transactions are often driven by emotions, personal preferences, and impulse buying, while B2B transactions are typically based on rational decision-making, long-term relationships, and meeting business objectives.

The marketing and sales strategies for B2C and B2B commerce also differ. B2C commerce often relies on mass marketing, advertising, and branding to attract a large number of individual consumers. B2B commerce, on the other hand, relies more on building relationships, providing personalized solutions, and offering value-added services to meet the specific needs of other businesses.

Overall, the main difference between B2C and B2B commerce lies in the target audience, scale of transactions, focus, and marketing strategies employed by businesses.