This white paper discusses the transformation of metro networks, emphasizing the shift from traditional models to a Cloud Metro approach. It outlines the challenges faced by service providers, including explosive traffic growth, rising customer expectations, cybersecurity threats, skills shortages, and sustainability commitments. The paper presents Cloud Metro as a solution that applies modern cloud principles to enhance the efficiency and sustainability of metro infrastructures. It details how Cloud Metro can improve service delivery by focusing on user experience, utilizing automation and AI, and achieving significant cost reductions. The document also highlights the collaboration between Juniper Networks and NEC in providing a comprehensive Network Transformation Service to facilitate this transition. The benefits of adopting Cloud Metro include lower total cost of ownership, enhanced security through embedded Zero Trust principles, and operational efficiencies that address the skills gap in the industry. Overall, the paper serves as a guide for service providers looking to modernize their metro networks for future demands.