What is ISO?
ISO is,In Digital Photography ISO measures the sensitivity of the image sensor. The same principles apply as in film photography – the lower the number the less sensitive your camera is to light and the finer the grain. By choosing a higher ISO you can use a faster shutter speed to freeze the movement.
My own images;
On some of these photographs, I set the shutter speed to 1/2000 then after I took the same images another 6 times and changed the iso every photograph. the different shutter speed makes the images have more depth to them.