Can someone explain how this piece of code from third person prefab works ?

 // calculate camera relative direction to move:
                 m_CamForward = Vector3.Scale(m_Cam.forward, new Vector3(1, 0, 1)).normalized;
                 m_Move = v*m_CamForward + h*m_Cam.right;

m_CamForward and m_Move are vector3

v and h are GetAxis inputs

m_Cam is transform of the main camera

The code is supposed to calculate the movement direction of the character relative to the camera but I'm struggling to understand what Vector3.Scale does and why it is used. It says it multiplies the components of two vectors but why do you want to multiply m_Cam.forward with (1,0,1) ? What happens when you multiply (0,0,1) with (1,0,1) ? And why normalized, does it also multiply the magnitudes ? Is there an easy way to visualise these vectors so I can understand a bit better ? Or is there a good tutorial to get used to working with vectors in unity ?