Notice how your head is balancing on top of your spine imagine it’s like a ping pong ball just floating.
Look straight at a mirror then put a finger in the hollow at the back of each ear and slowly nod your head. Notice where the movement is happening, this is your head neck joint. If this joint is tight it will affect your overall use, the way you move. Imagine space in the joint and fill it with oil. Doing this regularly will help you get more awareness of the atlanto occipital joint (head neck joint).