Literature reviews bring together theories and results from a number of studies to describe the "big picture" of your area of research and provide the context for your research study. Your literature review should be a compelling narrative about the research trails you followed, how they build up to your study hypothesis, and why your research study is original and important.
Your Introduction and Literature Review should:
Be more than a summary of the articles you read
Bring together theories and results from a number of studies to provide background for your project and demonstrate how your research study hypothesis fits into this current research area
Be a compelling narrative about how the articles you've read have built up to your study and make the case for why your research study is important