This document discusses review literature, which involves searching and evaluating available literature on a subject to demonstrate an in-depth understanding. Key concepts of review literature include surveying, synthesizing, critically analyzing, and presenting available information in an organized manner. Review literature helps identify research gaps, avoids duplicating existing work, builds on current knowledge, and provides intellectual context. It should be structured with an introduction, main body organized by themes, and conclusion that evaluates the current state of literature and outlines areas for future study.