RL in industrial robotics is a very active area of research as it is a natural adoption of this paradigm in the real world. The potential and benefit of industrial intelligent robots are huge and extensive. RL enables Industry 4.0 (referred to as the fourth industrial revolution) with intelligent devices, systems, and robots that perform highly complex and rational operations. Systems that predict maintenance, real-time diagnoses, and management of manufacturing activities can be integrated for better control and productivity.