Les command for distances from anchor to tag and position

Hello Engineers
I would like to ask about meaning when you run LES command on UART shell. From the attached picture, number 1 is it position of the anchor? number 2 is distance from anchor to the tag?,number 3 is the psoition of the tag? number 4 means is the quality factor and what is the meaning of that value? Lastly why values of tag and distances from anchor to the tag keeps changing while I placed tag to fixed distance?