Marketing strategy is a process that can allow an organization to concentrate its limited resources on the greatest opportunities to increase sales and achieve a sustainable competitive advantage. Marketing strategy involves careful scanning of the internal and external environments. Internal environmental factors include the marketing mix, plus performance analysis and strategic constraints. External environmental factors include customer analysis, competitor analysis, target market analysis, as well as evaluation of any elements of the technological, economic, cultural or political/legal environment likely to impact success. A key component of marketing strategy is often to keep marketing in line with a company's overarching mission statement.