The effectiveness and quality of a communication network is evaluated using the performance monitoring metrics. Some common metrics include: signal strength which shows the received signal's power level; data throughput which measures the data transferred during a specific timeframe; latency which signifies the time taken for sending and receiving data; and packet error rate which tells the rate of packets that were received in a distorted state. Monitoring these metrics assists network operators in detecting performance problems like signal interference or network congestion. They can implement solutions, such as reconfiguring the network or upgrading the hardware, to resolve these issues.