A literature review ought to be a clear, concise synthesis of relevant information. A literature review should introduce the study it precedes and show how that study fits into topically related studies that already exist. Structurally, a literature review ought to be something like a funnel: start by addressing the topic broadly and gradually narrow as the review progresses.
from Literature Reviews by CU Writing Center
Reference to prior literature is a defining feature of academic and research writing. Why review the literature?
from Literature Review Basics from University of La Verne
Synthesize your findings. Your findings are your evaluation of the literature reviewed: what you consider the strengths and weakness of the studies reviewed; the comparison you did between studies; research trends and gaps in the research that you found while researching your topic, etc...
Across the articles that you read, pay attention to what are the:
Your literature review should have the following components:
A literature review may exist as: