This holds the SSID that a detected wireless station included in its last probe request, indicating which network name that device is searching for. An admin can use this to see whether nearby unassociated clients are looking for the local network or for some other SSID entirely, such as a saved home or previous-employer network. For example, seeing a detected station repeatedly probing for a former office's SSID while sitting outside the building highlights a client that hasn't forgotten a prior network profile.