The review of the literature can be defined as a selection of available documents (published and unpublished) on the subject that contain information, ideas, data and evidence written from a certain point of view in order to fulfill certain goals or to express certain views on the nature of the topic and how to investigate, as well as an effective assessment of these documents in relation to the proposed study. (Hart, 1998). The need to review related literature is known as a thorough and in-depth insight into the work published in this area.
Relevant literature is an important step in getting a complete picture of what is being done about the issues being considered.