A national survey is a research method used to collect data from a representative sample of individuals in a specific country. This type of survey aims to gather information on various social, economic, and political issues to provide insights into the opinions, behaviors, and attitudes of the population. National surveys typically involve collecting data through questionnaires, interviews, or online surveys, and the results are used to inform policies, make decisions, and understand trends at the national level. The data collected from national surveys are often analyzed and reported in academic journals, government reports, and media outlets.