A literature review is crucial in research as it provides a comprehensive overview of existing knowledge on a topic, identifying gaps and trends. It establishes the foundation for new research by summarizing previous studies, highlighting methodologies, and discussing theoretical frameworks. This process not only helps in shaping the research questions but also ensures that the study builds on and contributes to existing knowledge. Additionally, a well-conducted literature review demonstrates the researcher's understanding of the field and enhances the credibility and relevance of their work.