The literature review as the name implies is a review of the literature that you judge to be important to the topic/issue you are examining or researching. There is a lot of good advice online to help you work through the do's and don'ts of writing such a document.
University of Toronto writing support group
University of California at Santa Cruz library
Deakin University library
University of Wisconsin-Madison writing centre
UNSW Learning Centre
pdf from University of Melbourne services