In popular usage, “marketing” is the promotion of products, especially advertising and branding. However, in professional usage the term has a wider meaning which recognizes that marketing is customer centered. Products are often developed to meet the desires of groups of customers or even, in some cases, for specific customers. E. Jerome McCarthy divided marketing into four general sets of activities. His typology has become so universally recognized that his four activity sets, the Four Ps, have passed into the language.  The four Ps are:  

Product: The Product management and Product marketing aspects of marketing deal with the specifications of the actual goods or services, and how it relates to the end user’s needs and wants.  

Pricing: This refers to the process of setting a price for a product, including discounts.  Promotion: This includes advertising, sales promotion, publicity, and personal selling, and refers to the various methods of promoting the product, brand, or company.  

Placement: (or distribution) This refers to how the product gets to the customer; for example, point of sale placement or retailing. This fourth P has also sometimes been called Place, referring to the channel by which a product or service is sold (e.g. online vs. retail), which geographic region or industry, to which segment (young adults, families, business people), etc.  These four elements are often referred to as the marketing mix. A marketer can use these variables to craft a marketing plan. The four Ps model is most useful when marketing low value consumer products. Industrial products, services, high value consumer products require adjustments to this model. Services marketing must account for the unique nature of services. Industrial or B2B marketing must account for the long term contractual agreements that are typical in supply chain transactions. Relationship marketing attempts to do this by looking at marketing from a long term relationship perspective rather than individual transactions.