A literature review is vital in research as it provides a comprehensive understanding of existing knowledge, identifies gaps, and establishes the context for new studies. Reviewing previous research allows scholars to build on established theories, avoid duplication, and refine their research questions. It helps identify reliable sources, shape the research framework, and ensure the study is well-grounded. Ultimately, a well-structured literature review enhances the credibility and relevance of research by demonstrating a solid foundation of existing knowledge in the field.