VLAN vs Vlan Tagging winbox?

I did get things to work, but was curios about the gui. Even though I have a defined ‘vlan’ I never see it in the ‘vlan’ tab. Yet I do see it in the vlan tagging, tab.

What is the purpose of the ‘vlan’ tab under ‘switch vlan’ in winbox? Vlans inside of Vlans? Virtual Vlans?

Thomas