Mcdonald's is marketing its product Big Mac by targeting the young generation of college students who are more likely to consume fast food. The marketing strategy includes segmentation based on income and age, and positioning the product at accessible locations such as college campuses where the target market can be easily reached. By doing so, McDonald's aims to increase its sales and profitability. Effective market research is crucial for marketers like McDonald's to make informed decisions about their products, pricing, placement, and physical distribution.