What is shutter-speed

Shutter speed (also known exposure time), stands for the length of time a camera shutter is open to expose light into the camera sensor. The faster the shutter speed, the easier it is to help freeze action completely, as seen by the picture of two birds.
However if the shutter speed is slow, it can create an effect called motion blur, where moving objects appear blurred along the direction of the motion, and can be used in things like advertisements for cars, motorbikes and nature, as seen below of the water.
I experimented myself with this blurred effect within school and this was the outcome:

I later tried using a long shutter speed at night on the road, to capture the lights of cars to a greater affect, and really produce a contrast between the darkness and the light. These were my outcomes: