A literature review is a review of the published literature (e.g. articles, books) on a specific topic or research question and may involve analyzing, summarizing, and synthesizing your findings. There are different types of literature reviews and they can vary across disciplines and course assignments. The What is a Literature Review video (3:27 minutes) provides an overview.
Always check with professor about requirements for your specific assignment
Start early as it takes time to find and analyze the research