Definition of LAN in one of the YouTube videos

In regards to the video How To Setup VLANS With pfsense & UniFI. Also how to build for firewall rules for VLANS in pfsense… I have a question about his meaning of LAN. In the graphic, he has two switches connected to each other and one is connected to the pfSense. When he sets the rules for the IoT VLAN, he blocks traffic destined for LAN on that same physical port that the VLAN is set to. Does LAN traffic mean traffic destined for devices plugged into any port on either switch that has not been tagged as a VLAN port?

LAN & IOT are different subnets and VLANS are subnets running across the same physical wire.