Businesses sell products or services to non-business customers, such as in an online retail store.
Consumers sell products or services to other consumers, such as on eBay and Craigslist.
Businesses sell products or services to other businesses, such as through an online directory or product website.
Consumers sell products or services to businesses. For example, Google AdSense and influencer marketing services enable bloggers and other web content providers to sell advertising space to businesses.
Businesses conduct transactions with public administration or government bodies, such as an ammunition manufacturer selling to U.S. Army.
Consumers conduct transactions with public administration or government bodies, such as filing taxes.