Marketing is primarily concerned with two main concepts: the identification and assessment of consumer and industrial market needs, and the development of marketing programs to satisfy those needs. Marketing personnel in profit and nonprofit organizations analyze markets and industries to define new opportunities and refine existing opportunities. Marketers also are responsible for developing and managing products and services, along with promotion, distribution, and pricing appropriate to the targeted market opportunities. Students who major in marketing enjoy a wide range of employment opportunities. These include sales and sales management, services marketing, retailing, brand management, market research, distribution and logistics, and advertising.