High ISO settings are useful for capturing fast action in poorly or unevenly-lit situations. (Taken with ISO 800 sensitivity, 1/800 second at f/6.3.) The white balance setting is used to make the colours in a digital photograph look natural under a variety of lighting conditions. shown in the top

taking photos with high IOS can make your photos look grainy and not look as good as it could be. Also taking photos with low IOS can make your photos look can make your photos look darker.