Data refers to the information necessary for exploring a research issue following appropriate design. The significance of data collection stems from the fact that without obtaining specific information, research cannot be effectively conducted. Data can be categorised as either primary or secondary. In public health research, primary data is typically obtained through methods such as observations, interviews, questionnaires, and databases. On the other hand, secondary data sources consist of previously published books, magazines, journals, and even unpublished autobiographies and biographies. Consequently, data collection is essential for completing the research process, making it a fundamental component of research.