What is the stealthiest way to walk?

Could you elaborate on what constitutes the most inconspicuous or stealthy manner of walking? Is it a matter of step length, the sound produced by footsteps, or perhaps body posture and the way one carries themselves? Are there specific techniques or training methods that can be employed to enhance one's ability to walk without drawing attention? Are there any environmental factors that should be taken into consideration when aiming for stealthy walking?