Marketing is defined by the American Marketing Association as the activity, set of institutions, and processes for creating, communicating, delivering, and exchanging offerings that have value for customers, clients, partners, and society at large. The term developed from the original meaning which referred literally to going to market, as in shopping, or going to a market to buy or sell goods or services.

Marketing practice tends to be seen as a creative industry, which includes advertising, distribution and selling. It is also concerned with anticipating the customers' future needs and wants, which are often discovered through market research. Seen from a systems point of view, sales process engineering views marketing as a set of processes that are interconnected and interdependent with other functions, whose methods can be improved using a variety of relatively new approaches.

Marketing is influenced by many of the social sciences, particularly psychology, sociology and economics. Anthropology and neuroscience are also small but growing influences. Market research underpins these activities. Through advertising, it is also related to many of the creative arts. The marketing literature is also infamous for re-inventing itself and its vocabulary according to the times and the culture.