Identify keywords that relate to your topic to assist you when you are searching for resources. Often different words can describe the same concepts and as a researcher, you can never be sure which keywords will bring back the information you are looking for.
Brainstorm related terms, broader terms and narrower terms related to your topic.
A literature review is an evaluative report of information found in the literature related to your selected area of study. The review should describe, summarise, evaluate and clarify this literature. It should give a theoretical base for the research and help you (the author) determine the nature of your research.
Source Credit: http://libguides.library.cqu.edu.au/litreview
Image Source: http://s3.amazonaws.com/libapps/accounts/38792/images/Literature_Review_Graph.jpg
Image Source: https://www.lib.ncsu.edu/tutorials/litreview/