Digital transformation is a radical change that involves integrating technology and digitalization models into all aspects of business, leading to substantial changes in corporate culture -the way companies and their employees operate. The paper aims to analyse the phenomenon of Smart Working and digital transformation from the perspective of technologies that have enabled employees to continue working remotely during Covid-19. In order to achieve this goal, the following objectives have been defined: 1) to present the topic of digital transformation, with a particular focus on the new technologies that enable this revolution, such as Big Data and Analytics, Cloud Computing, cybersecurity or the Industrial Internet of Things; 2) to explain how digital transformation leads to the transformation of the world of work through the introduction in companies of the technologies mentioned in the first objective; 3) to analyze the concept of Smart Working, differentiating it in particular from the closely related notions of flexible working, remote working and teleworking.