Concurrent Users (CCU) refers to the number of users simultaneously accessing and interacting with a software application or online service at any given time. In Unreal Engine and pixel streaming platforms like Arcane Mirage, CCU metrics are critical for measuring application scalability, server capacity, and user engagement. High CCU capabilities enable applications to support large-scale multiplayer experiences, virtual events, and real-time collaborative environments without performance degradation or service interruptions. By optimizing server architecture, network infrastructure, and resource allocation, developers can enhance CCU capacity, ensuring seamless user interactions and maintaining application stability during peak usage periods.