This guide provides guidance and links to use when researching marketing and advertising topics.
"pertains to the interactive process that requires developing, pricing, placing, and promoting goods, ideas, or services in order to facilitate exchanges between customers and sellers to satisfy the needs and wants of consumers." (Marketing, Encyclopedia of Business and Finance)
“the circulation of information and product endorsements that attempt to persuade people to consume particular goods and services.” (Advertising, Encyclopedia of Consumer Culture)
Be aware that there are other possibilities. Be sure to check the NAICS search to find more options if these examples don't help you.
This U.S. Census website describes NAICS codes and includes tools to find these codes.