The MonB5G represents the joint effort of twelve organizations from eight European countries (Greece, Spain, France, Ireland, Poland, Germany, Cyprus and Finland), during 42 months. The MonB5G project capitalised on artificial intelligence (AI) for smart, flexible and automated management of 5G and 6G network resources. The project used AI-based mechanisms for zero-touch management and orchestration of massivescale network slices. With the application of AI algorithms, networks acquired self-configuration, selfmonitoring, self-healing and self-optimization capabilities, without the need for human intervention. MonB5G presented a hierarchical, fault-tolerant, AI-based, automated network management framework that includes security and energy efficiency techniques for orchestrating many parallel network slices. The concept of “network slicing” referred to the division of a virtual network infrastructure into multiple customized and independent segments and the suitable allocation, per case of use, of network resources to efficiently serve different requirements. Each network slice, assisted by AI, ensured the seamless operation of demanding applications that may require high capacity and low latency. In addition to the provision of reliable and high-quality services, the use of AI enhanced the infrastructure security and improved the energy efficiency of networks. Overall, the MonB5G project's potential impacts can also extend beyond technical advancements and have the potential to generate socio-economic benefits, drive innovation, and positively influence the wider society by improving network efficiency, enhancing service quality, strengthening security, promoting sustainability, and contributing to economic growth for operators and service providers.