This chapter explores the case study, which is a very common research method in the field of social sciences. Case studies are important because they provide the examination of samples of a larger atmosphere, therefore enabling researchers with a variety of possibilities: to deepen the analysis of a particular occurrence in the world, to contribute to an existing theoretical framework, and to serve as an instrument of comparative analysis. Although it might sound simplistic, the research framework for case studies usually has to satisfy a few key points. Case studies can be divided into separate categories: exploratory, descriptive, and explanatory. They are also directly related to the type of research question being posed from the traditional five types of survey questions: ‘who’, ‘what’, ‘where’, ‘how’, and ‘why’. One can often find case studies among both qualitative and quantitative approaches, focusing on a case study per se or on cross-case method.