What are the marketing concept, relationship marketing, and marketing strategy?

"Marketing includes those business activities that are designed to satisfy consumer needs and wants through the exchange process. Marketing managers use the “right” principle—getting the right goods or services to the right people at the right place, time, and price, using the right promotional techniques. Today, many firms have adopted the marketing concept. The marketing concept involves identifying consumer needs and wants and then producing products (which can be goods, services, or ideas) that will satisfy them while making a profit. Relationship marketing entails forging long-term relationships with customers, which can lead to repeat sales, reduced costs, and stable relationships. A firm creates a marketing strategy by understanding the external environment, defining the target market, determining a competitive advantage, and developing a marketing mix. Environmental scanning enables companies to understand the external environment. The target market is the specific group of consumers toward which a firm directs its marketing efforts. A competitive advantage is a set of unique features of a company and its products that are perceived by the target market as significant and superior to those of the competition. To carry out the marketing strategy, firms create a marketing mix—a blend of products, distribution (place) systems, prices, promotion, and people. Marketing managers use this mix to satisfy target consumers. The mix can be applied to nonbusiness as well as business situations."