Which wireless monitoring metric is required to optimize a wireless network?

Channel utilization directly measures how much airtime is consumed by wireless transmissions (including data, management, and interference).

Monitoring channel utilization helps optimize the network by:

Identifying congestion or over-utilized channels.

Allowing channel re-planning and SSID optimization.

The other options (AP firmware, event logs, user count) are helpful, but only channel utilization gives actionable insight for radio resource optimization.