A literature review is a survey of research on a given topic. It allows you see what has already been written on a topic so that you can draw on that research in your own study. By seeing what has already been written on a topic you will also know how to distinguish your research and engage in an original area of inquiry.
A literature review helps you explore the research that has come before you, to see how your research question has (or has not) already been addressed.
You will identify:
According to Byrne's What makes a successful literature review? you should follow these steps:
from Byrne, D. (2017). What makes a successful literature review?. Project Planner. 10.4135/9781526408518. (via SAGE Research Methods)