Packet loss occurs when data packets traveling across a network fail to reach their destination. This can happen due to various reasons, such as network congestion, hardware malfunctions, or poor signal quality. When packets are lost, it can lead to delays, interruptions, or degraded performance in applications like video streaming, online gaming, or voice calls. To measure packet loss, network administrators often use tools that analyze the flow of data. A small percentage of packet loss may not significantly impact performance, but higher rates can result in noticeable issues. Addressing packet loss typically involves optimizing network conditions or upgrading equipment to ensure reliable data transmission.