Social media have revolutionized communication in tourism industry. Review of the current literature revealed that previous studies have examined the role of information technology in tourism, but still there is a lack of study to reveal how social media promote knowledge sharing processes. To this end, the authors review extant related articles in knowledge management in tourism. The purpose of this study is understanding of knowledge sharing in social media in tourism sector. Specific concentration is on integration of tacit knowledge sharing during pre-travelling decision making. Finding of this study contribute to researchers, organizations and policy makers in tourism industry.

Based on Economic transformation programme of Malaysia Tourism and hospitality are one of the significant factors which effect on economy for achieving the vision of Malaysia 2020. In other hand, Rapid growths of these industries have effect on environment. This research tries to propose a new model by merging Theory Reasoned Action and Theory Planned Behaviour models which are implemented in achieving intention of consumer behaviour toward choosing Green hotels in Malaysia. Findings of this research will help the marketing policy makers and hotel managers to attract positional tourists who will visit Green hotels in Malaysia.