Marketing is the process of matching products with markets and facilitating ownership transfers. Traditionally, marketing focused on sales, but modern marketing is consumer-oriented. This change occurred due to elements of innovation and changes in customer attitudes. Marketing involves a mix of controllable factors like product, price, promotion, and place as well as uncontrollable factors like customer behavior. The functions of marketing include buying, assembling, processing, selling, transporting, storing, standardizing, financing, bearing risk, and providing market information. Salesmanship is the art of converting suspects into prospects and prospects into customers. The aims of marketing are to create, maintain, and expand demand for new and existing products while guiding buyers and building goodwill.