The literature review will be an integrated synthesis of prior research and theory that relates to your current study/experiment. It aids the reader in gaining understanding about your research study and shows that you have an in-depth grasp of your subject, and that you understand where and how your own research fits into and contributes to an existing body of knowledge. Information should be presented in an organized way that critically analyzes the information you will gather. In addition, a literature review should:
Summarize prior research while showing how your current research is linked to it.
Integrate and summarize what is already known about your subject.
Demonstrate that you are aware of other researchers work, have learnt from that research, and will be contributing a new perspective/new ideas with your own current research.