CEVAP:

The general purpose of literature review is to narrow down the focus of your research, to focus on it, and to help readers relate it to your research. One of the main aspects of literature review is the decision about which literature should be included and which literature should be excluded. When writing a research report or a journal article, there will naturally be a word limit. It is, therefore, necessary to decide which authors should be included and how much space should be allocated to each.