The document discusses the importance and process of reviewing related literature for a research study. It states that reviewing related literature provides a conceptual framework, informs the researcher of past related studies, and allows the researcher to learn from other studies' methods, findings and conclusions. To review literature, the researcher must summarize problems, methods, findings and conclusions of past studies and distinguish their own study. The review can help determine if a study duplicates past work and provide essential background for defining a research problem and methodology. There are two types of related literature - research and conceptual - and several guides a researcher can use to search for literature.