This is the average throughput measured across all iterations run at this frame size, using the same Mbps*100 encoding as the min and max fields (so 12345 means 123.45 Mbps). An admin looks at how close the average sits to the maximum to judge test consistency: if avg and max are nearly equal the link performed steadily, whereas a much lower average than max signals intermittent degradation between iterations rather than a single bad run. For example, a max of 95000 but an avg of only 70000 would tell the engineer that throughput at this frame size is unstable across repeated iterations rather than reliably near-line-rate.