The primary objective of the review article is to present and critically assess current state of understanding on a field through summary, classification, analysis or comparison. It does not usually report new facts or analyses. The review article provides an overview of major advances and findings from studies that have been published in the respective field. It informs readers on most recent publications and on ongoing theoretical, conceptual or methodological debates in the area concerned. The review article also synthesizes findings resulting from hitherto research, possibly to identify patterns and trends in the literature. It also identifies significant research gaps and suggests areas of where future research might go next. In contrast to reviews, reviews articles are subject to the peer-review process.