The demand for cloud services is rising continuously, inflating the energy demand for data centres exponentially. The purpose of this literature review is to discover the positive impact liquid immersion cooling can have on data centre efficiency and density. Utilizing a systematic literature review, this paper illustrates the research already conducted on immersion cooling. The calculated results, using the available data, shows that by switching from air to liquid immersion cooling, about half the energy used by a data centre and two thirds of the space occupied by a data centre can be freed for additional hardware. This review succeeds in showing the capabilities of liquid immersion cooling in data centres. Further research can be conducted on the actual improvement when a data centre is converted to immersion cooling.