You will need to identify, analyse and interpret key themes in relevant previous studies and relate them to your own research focus. You should not just describe the contribution of each study in a list-like chronological sequence but, instead, make connections between the studies and integrate them. In order to justify your own research , you need to show limitations or gaps in existing research. In other words, you are evaluating the literature and thereby ‘making space’ for your own research. In some disciplines, this purpose determines the organisation of the entire literature review, while in others it occurs within particular sections.