Human brain can automatically adjust different color temperatures. It commands our eyes compensate for lighting conditions relate with color temperatures. White balance (WB) is the process of preventing unrealistic color to appears, so that objects which appear white in person are look like in your photo. This helps insure the other colors appear as natural as possible. Previously is an advantage digital camera has over film camera.  With film, color films can only correctly record the colors in certain range of color temperatures. Therefore, we have daylight and tungsten films. Film camera requires attaching a different cast-removing filter for each lighting condition but in digital camera this is no longer required.

Most digital cameras usually have built-in white balance feature. Whereby the camera have a sensors to measure the current color temperature and get overall color of the image then calculates the best-fit white balance so that the final result may be close you see. Most digital cameras allow you to use automatic white balance or select several preset conditions built-in your digital camera such as full sun, cloudy day and so forth.  Automatic white balance will support in most conditions. Sometime white balance being used may not be accurate enough to make every condition correct.

Practice taking the same photo with different white balance settings is the good idea. Suppose that you set the white balance to a low color temperature and take a photo under sunlight. Because the white balance low, the white balance process is more sensitive to the red light rather than the blue one. Therefore the resulting image will be bluish. Keep notes until you understand each setting does this will bring you come to automatically sense which setting the best white balance for specific situation. 

White balance is a small factor that can make your finished picture beautiful or bad. If practice to use white balance is spent more time, the best white balance solution is using the RAW file format (but make sure your camera support this feature), this feature allow you to set the WB *after* the photo has been taken. RAW files also allow one to set the WB based on a broader range of color temperature and green-magenta shifts. By this method setting a white balance with a raw file is quick and easy