Identify factors not previously considered and researched

 Literature reviews can vary with depth and breadth as well as formatting and presentation requirements. They can range from superficial searches that aid in insight to rigorous systematic reviews.
The purpose of this review is to help you further identify and clarify your research issue or problem. You can use this literature review to:
Investigate the most current research and findings available pertaining to your topic.
Discover common findings amongst studies.
Obtain a history of the problem or issue.