White balance
White balance is a camera setting that adjusts the colour balance of light the you’re shooting in so that it appears a neutral white, and it’s used to counteract the orange/yellow color of artificial light, for example, or the cold light of deep shadow under a blue sky so that portrait shots taken in shade look more natural.
All digital cameras have an auto white balance setting that analyses the colours in a scene and neutralists them automatically. Mostly it does a very good job, though there are occasions when you need to override the auto white balance setting and choose a setting yourself.
below is a example of white balance