Abbreviated as WB, white balance is a function of a digital camera used to compensate for different colors of light being emitted by different light sources. In digital photography the term is generally used to describe a function of a digital camera that allows you to calibrate the device to correctly display the color white. Once this calibration has been done, the camera should then display other colors correctly as well.
Tutorial: Understanding White Balance White balance (WB) is the process of removing unrealistic color casts, so that objects which appear white in person are rendered white in your photo.