Data Science usually refers to an interdisciplinary field of study that draws from mathematics, statistics, computer science and engineering, and economics to extract knowledge and insights from structured and unstructured data to support better decisions. Data science is strongly related to Artificial Intelligence (AI) and Big Data. The former can be seen as systems that display intelligent behaviour by analysing their environment and the associated data and then taking actions to achieve specific goals. Big Data, instead, refers to a set of data whose complexity – not only in terms of size – prevents the use of classical processing techniques, requiring advanced methods to effectively scale. In essence, we can say that Big data are the fuel of AI.