White balance is adjusting colours in the camera so that the picture looks more natural. We go through the process of adjusting colours to primarily to get rid of the colour casts. So we match the picture with what we saw when we took it. Human eyes automatically adjusts the colour temperature , so we normally see the colour correctly. We can edit the picture by using white balance to make the picture warmer or cooler depending on the light. There is a dial and it says wb (White Balance ) and you can change the setting from there to cloudy , tungsten and sunlight etc.