What is it?
While Aperture is responsible for controlling how much amount of light passes through the lens, the Shutter Speed is responsible for controlling the length of time that the light is allowed to hit the camera’s sensor.
The shutter speed controls the amount of time that the shutter curtain is left open. The shutter speed gives you control over how motion is captured in your photograph.
Shutter speeds that are faster than your moving subject will create a photograph of the moving subject in a ‘frozen’ state. The photograph will come out with the subject being very sharp, in focus and seemingly in a stopped motion. You are basically capturing a split second image of the moving subject.
If, on the other hand, your shutter speed is slower than the moving subject then you will create a blurred image of your subject which generally represents a subject in motion.
Experimenting with long shutter speed: