The object that the camera wants to move with (the Body target). The Body component of the CinemachineComponent pipeline will refer to this target and position the vcam in accordance with rules and settings that are provided to it. If this is null, then the vcam's Transform position will be used.

[TooltipAttribute("The object that the camera wants to move with (the Body target).  If this is null, then the vcam's Transform position will define the camera's position.")]
[NoSaveDuringPlayAttribute]
public Transform m_Follow

var m_Follow