Age groups are categories that divide people based on their age. Commonly used age groups include children (0-12 years), teenagers (13-19 years), young adults (20-35 years), middle-aged adults (36-55 years), and seniors (56 years and older). These classifications help in understanding social, economic, and health-related trends. Each age group often has distinct characteristics and needs. For example, children typically require education and care, while young adults may focus on career development and independence. Understanding these groups aids in tailoring services, policies, and products to meet the specific needs of different segments of the population.