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 research questions, and why your research study is 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 questions fit 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