In recent years, knowledge has been widely recognized the most crucial competitive asset (Palacios and Garrigos, 2006). Knowledge refers to a theoretical or practical understanding of a subject. Knowledge management (KM) has become a very common term in the twenty- first century, as it has been applied to a wide spectrum of activities and areas with the purpose of managing, creating and enhancing intellectual assets (Shannak, 2009). And it has become enriched with a huge wealth of contributions from many scholars and an extensive accumulation of experiences. From a deeper point of view, KM should be a kind of working method and philosophy. KM is a part of the field of management studies, but it is also closely integrated with information and communication technologies (Mihalca et al., 2008). In fact, KM can be observed from several perspectives, as there are a number of fields that contribute to it. Prominent among them are the fields of philosophy, cognitive science, social science, management science, information science, knowledge engineering, artificial intelligence and economics (Kakabadse et al., 2003). Why the need to manage knowledge? Nowadays we are in the era of knowledge. The reason of increased importance of knowledge lies in the fact that effective management of knowledge brings many positive outcomes to improve learning efficiency. And we implement KM initiatives with the expectation that it will result in increased competitive advantage. KM is used to capture, document, retrieve and reuse knowledge, as well as to create, transfer and exchange it (Dayan and Evans, 2006). There is no limit to where KM can be applied, ranging from individual learning, small enterprises to large multinational corporations: KM has become increasingly more important for individuals to understand what information is essential, how to administer this essential information and how to transform essential information into permanent knowledge (Tseng et al., 2012); KM plays a fundamental role in the success of an organization’s activities and strategies (Castrogiovanni et al., 2016). Therefore managing and using knowledge effectively is vital for both individuals and organizations to take full advantage of the value of knowledge. During the past decade, numerous publications dealing with KM reviews from different perspectives have been published. Ragab and Arisha (2013) categorized different branches of KM research. Serenko (2013) analyzed the stock of KM publications and identified citation classics in KM field. Makhsousi et al. (2013) reviewed recent advances on the implementation of KM in different areas and discussed why some of KM implementations fail and how they could turn into a successful one. Arisha and Ragab (2013) provided a literature review and categorized the analysis of the rapidly growing number of KM publications, and they offered a comprehensive reference for newcomers embarking on research in the field. Matayong and Mahmood (2013) reviewed the current literature of KM systems studies in organizations. Chiliban et al. (2014) reviewed different KM models based on their strengths and weaknesses. Tzortzaki and Mihiotis (2014) studied how the theory revolving around KM has developed over the years. Omotayo (2015) reviewed the literature in the area of KM to bring out the importance of KM in an organization. Asrar-ul-Haq and Anwar (2016) reviewed the attempts to provide the evidence base concerning knowledge sharing and KM in organizational settings.