Ethernet switches that do not have loop detection

I’m just curious. I was looking at cheap unmanaged Ethernet switches and some of them say No loop end. I had never heard of that. It seems to me (if I understand this correctly) that if a switch does support this the data lights on the switch would blink a different color indicating that cable is in a loop. For people that don’t know what a loop end is. It lets you know that both ends of a particular Ethernet cable are both connected to the switch. If that is not correct, someone please educate me