Research design refers to the systematic and strategic plan or blueprint that outlines the methods and procedures used to collect, analyze, and interpret data in a research study. It serves as a roadmap for researchers to ensure that their study is well-structured, valid, and reliable. A well-designed research study includes clear research questions, appropriate data collection methods, and a detailed data analysis plan. It is a crucial aspect of any research project as it guides the entire research process and helps to ensure the accuracy and credibility of the findings.