The key components of an MIS include internal records systems, marketing intelligence systems, and marketing research systems. An MIS supplies three types of information on a recurring, monitoring, and requested basis to help marketing managers identify problems and make decisions. Sources of information come from both internal sources like sales and cost analysis as well as external sources. The importance of an MIS is that it allows companies to anticipate customer demand, take a systematic approach, analyze competition, and understand consumers in order to inform strategic planning.