The purpose of this thesis is to explore the use, usability and the effects social media have on member effectiveness and satisfaction in virtual projects. This includes a classification and description of social media as well as the virtual component of projects. This also includes an analysis of possibilities and challenges concerning using social media in a project setting.Furthermore this master thesis should include an empirical component, including an investigation of to what extent such media are used in virtualized projects, experiences with such media and suggestions for improvements / better integration with other collaborative efforts.