The thesis object concerns the study of a new technological paradigm, with deep influence over the industry sector, the Digital Twin. In particular will be put under analysis the impact which the latter have with regard to the SME (Small and Medium Enterprises). The evolution of the concept of Industry 4.0 has led to the born of new technology able to re-design the traditional processes and approaches in the firm management. For such a reason, a broad investigation of literature about Industry 4.0 is offered with reference to Digital Twin. It has been conducted a market research, during the internship at Istituto Mario Boella, with the aim to acquire an insight with respect to actual state of knowledge and adoption of the proposed technological paradigm, through the constitution of an ad-hoc questionnaire.