Socio-demographic criteria refer to the various characteristics and factors that are used to categorize and understand a population or group of people. These criteria include aspects such as age, gender, income, education level, occupation, ethnicity, and geographic location. They are often used in research and marketing to analyze and target specific segments of society based on their shared socio-economic and demographic characteristics. Understanding socio-demographic criteria can provide valuable insights into the behaviors, needs, and preferences of different groups, and can help inform decision-making and policy development.