Definition / Belongs to this divisionThis division includes:
- sale, permanent rental or resale of advertising time and space for different types of media (print, radio, TV, etc.)
It does not belong to this sectorThis division excludes:
- direct sale of advertising space, time by the owner (publisher, etc.), see the relevant section
- PR (public relation) activity, see 70.21

Definition / Belongs to this divisionThis division includes:
- examining the market potential, acceptability and user-friendliness of the product and assessing consumers' purchasing habits in order to facilitate sales and develop a new product, including a statistical analysis of the results,
- opinion polls on political, economic and social issues and statistical analysis of results (not separately)

Definition / Belongs to this divisionThis sector includes professional, scientific and technical services (except: legal and accounting services, architectural and engineering activities, technical testing and analysis, business and management consultancy activities, research and development and advertising).