B2C (Business-to-Consumer): Companies directly sell products or services to individual customers.B2B (Business-to-Business): Businesses provide goods or services to other businesses, often in bulk or as part of supply chains.D2C (Direct-to-Consumer): Manufacturers or brands sell directly to consumers, bypassing retailers and intermediaries.B2G (Business-to-Government): Businesses offer products or services to government agencies, often through contracts or tenders.