Literature Review is basically a comprehensive view of the previous researches on the topic of study. It is characterized by a logical flow of ideas, appropriate referencing, appropriate use of terminology etc.
Literature Review provides the researcher with the chance to look into the past researches conducted on similar topics of study. It helps the scholar in designing his study and aiming it towards a productive result. A literature review brings background information into full scope and the scholar as well as reader gets to know the background of the study, the reasons for this particular topic and also what would the study lead to. It also reduces chances of repetition of research on similar topic.