The tertiary sector of the economy, generally known as the service sector, is the third of the three economic sectors of the theory of the three sectors. Service marketing is a branch that specializes in marketing. Service marketing emerged as a separate field of study in the early 1980s, after recognizing that the unique characteristics of services require different strategies compared to the marketing of physical goods. Services are inherently intangible, are consumed simultaneously at the time of their production, cannot be stored, saved or resold once they have been used, and service offerings are unique and cannot be repeated exactly by the same service provider. services.