This document outlines the process and importance of reviewing literature for research. It discusses reviewing literature as an essential preliminary task to acquaint oneself with existing knowledge in an area of interest. The literature review contributes to clarifying the research problem, improving methodology, broadening knowledge, and contextualizing findings. The procedure involves searching literature, reviewing selections critically, and developing theoretical and conceptual frameworks. Overall, reviewing literature prevents duplicating past work, increases knowledge to refine the research problem, and gives confidence that a particular study is needed by identifying gaps.