The rig's root control and joint: the first component every rig needs before anything else can attach.
What it does
The anchor everything traces back to
World builds the single root joint and control that every other component ultimately attaches to.
The control sits at the root but stays aligned to world space (even if the root joint itself is rotated), so its axes are always predictable.
When to use it
First, once, at the very root
Add it first
Add World before anything else, so downstream components have a root to attach to.
No parent
It has no parent of its own; it's the anchor everything downstream traces back to.
Exactly once
Use it exactly once per rig.
Treat it as a singleton
The rig assumes exactly one World; a second instance would confuse anything that looks up the root control by name.
Never mirrored
There's no left/right version of World.
"World" as a space ≠ this control
Selecting "World" as a space elsewhere means a fixed reference pose, not this control's live animation. To follow the live control, target it directly.