The literature review is a survey of information found in scholarly articles, books, and other sources directly related to a field of study. The goal of a literature review is to find, describe, summarize, evaluate and clarify prior research already published about your topic. A good literature review goes beyond summing up the research of others: it explores the literature for key concepts and determines what has already been investigated. In essence, a literature review identifies, defines and measures key concepts related to research already completed in the field of study.
A literature review: