User's Manual

Here are descriptions of every setup items:
SSID: The Service Set IDentifier of wireless access point or other
network device. You can think it as the name of access point of
wireless device.
BSSID: The MAC address of wireless access point or other network
device. Unlike SSID, BSSID of every access point or network device
is unique, and will not be the same with others. So you can identify a
single access point or wireless device from others by BSSID, if they
all have the same SSID.
Signal: Shows the signal strength of access point or wireless device.
Larger number means better radio strength, which often means you’re
not too far from that access point or wireless device.