A literature review in a dissertation serves as a critical analysis of existing research relevant to your topic. Its primary purpose is to identify gaps in the current knowledge, establish a theoretical framework, and demonstrate how your study contributes to the academic field. A well-structured literature review offers a comprehensive overview of the topic, highlights key debates, and shows the progression of thought on the subject. It also helps in justifying the research methodology and guiding the formulation of research questions. For expert assistance, consider seeking Dissertation Literature Review Writing Help online from BookMyEssay.