Final answer:
A literature review in a dissertation involves reviewing existing research studies related to the topic of study. It helps researchers understand previous work done on the topic and position their own research to contribute to the existing body of knowledge.
Step-by-step explanation:
A literature review is an essential part of a dissertation that involves reviewing existing research studies related to the topic of study. This process helps researchers gain a comprehensive understanding of previous work done on the topic, identify gaps in knowledge, and position their own research to contribute to the existing body of knowledge. By conducting a literature review, researchers can build upon prior research and formulate a solid foundation for their own research.