A literature review serves several critical functions in the context of social work research. It plays a pivotal role in helping researchers gain a deep understanding of the existing body of knowledge on a given topic, providing a foundation for further investigation. One of the primary functions of a literature review is to offer a comprehensive and organized overview of existing research studies, theories, and findings that are relevant to the research question. By examining previous work, social work researchers can identify the gaps in knowledge, which helps in formulating a new research question or hypothesis that addresses these gaps. The literature review also provides a historical perspective on the evolution of thought and practice within the field of social work. It shows how concepts, theories, and methodologies have developed over time, enabling researchers to trace the progress of the discipline. This historical context is essential in understanding why certain approaches or interventions are preferred over others and how the field has responded to changing social needs, policies, and global issues. Furthermore, a literature review helps in identifying key theories, frameworks, and methodologies that have been used in prior research. In social work, theories such as ecological systems theory, strengths-based practice, and systems theory often shape research.