Industrial 4.0 made an industrial revolution by integrating digital technologies in various industrial sectors to increase the production of industries. This integration of digital technologies includes Cloud Computing (CC), Cyber-Physical Systems (CPS), Internet of Things (IoT), and Artificial Intelligence (AI) and so on. Industry 4.0 provides significant advancements and benefits, such as increased efficiency, flexibility and customization, it also has wide range of practical issues and challenges. This chapter gives an overview to Industry 4.0, focusing on the practical issues and challenges faced by organizations adopting these technologies. It explores the complexity of integrating new technologies into existing infrastructures. Industrial 4.0 also need for skilled labours who are skilled to integrate the advanced technologies with the existing one, and the challenges of security and privacy in an ever-changing interconnected environment. Moreover, the chapter discusses about the overcoming these challenges to realize the importance of Industry 4.0 and outlines approaches to overcome them.