The function of white balance is to make white objects appear white in various light conditions. We need white balance because the light conditions when we take photos sometimes change. White balance settings are usually adjusted to the light conditions when we take the photo. However, you can also use white balance to add color highlights to photos.
To be clearer, usually the photos we take are bluish or reddish in color, but this is not visible to our eyes, because our brain immediately corrects the color to white. But our cameras don't have that capability. So by using white balance the camera can correct the color to white regardless of the light source.
However, you can also use it intentionally to add an impression through the color of your photo. You can try taking photos with the "Daylight" preset. Your photo will be bluish in color. You can try again with the "Shade" preset then the color of your photo will be warmer.
Source : https://snapshot.canon-asia.com/indonesia/article/id/camera-basics-6-white-balance
1. Auto White Balance
The camera will automatically adjust the color of the light source by guessing the light temperature. Usually mostly used during the day and when using flash. But if the results are not as desired, you can use another white balance that is more suitable to the light conditions.
2. Daylight
Usually this mode is used for shooting under sunlight. The resulting color usually tends to be bluish.
3. Shades
This mode is usually used for outdoor shooting. This mode can give a shady and warm effect to photos.
4. Cloudy
This mode, as the name suggests, is usually used in cloudy or overcast conditions. This mode gives a warm and slightly bluish effect to the photo.
5. Flash
Usually used when you use flash to take pictures. This mode can give a warm effect to photos that tend to be cold.
6. Tungsten
This mode is usually used for indoor photography and uses house lights for lighting. This mode can give a cool effect to photos which are usually a bit yellowish due to the effect of the light.
7. Fluorescent
This mode is widely used when the light source is a neon lamp whose light produces a bluish color. In contrast to tungsten mode, this mode changes bluish light to a warmer one.