Quality of Service, or QoS, refers to the technology used in networks to manage data traffic and ensure a consistent level of performance. It prioritizes certain types of data, like video or voice calls, over less critical information, ensuring that important applications run smoothly even during high traffic periods. By implementing QoS, network administrators can control bandwidth allocation, reduce latency, and minimize packet loss. This is particularly important for businesses that rely on real-time communication tools, as it helps maintain a reliable and efficient network experience for users.