A multipoint control unit (MCU) is a device used in video conferencing that allows multiple participants to connect and communicate in a single session. It manages the audio and video streams from each participant, ensuring that everyone can see and hear each other clearly. This technology is essential for large meetings, webinars, and collaborative work environments. MCUs can support various communication protocols, making them compatible with different devices and platforms. They often include features like recording, screen sharing, and layout management, enhancing the overall experience for users. By facilitating seamless interaction, MCUs play a crucial role in modern communication.