This counter tracks all packets, good or bad, that are exactly 64 bytes long, which is the minimum standard Ethernet frame size. Network engineers use packet-size distribution to understand their traffic profile and detect unusual patterns like abnormal concentrations of minimum-sized packets. A value of 100,000 64-byte packets out of 1,000,000 total means 10% of your traffic is at minimum size, suggesting a workload of small requests or acknowledgments.