What is white balance? And, what are its uses?

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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. Proper camera white balance has to take into account the "color temperature" of a light source, which refers to the relative warmth or coolness of white light. Our eyes are very good at judging what is white under different light sources, but digital cameras often have great difficulty with auto white balance (AWB) — and can create unsightly blue, orange, or even green color casts. Understanding digital white balance can help you avoid these color casts, thereby improving your photos under a wider range of lighting conditions.

 

Technical adjustment (Setting camera to WB option and shot (as much) as white/bright surface.) that gives camera information about light and color warmth to get correct exposed photograph.

• White balance, is an option in the camera to adapt/correct the colour temperature of an image according to natural metrics of environment, it has multiple choice settings (Tungsten - Fluorescent - Sunny - Cloudy - Shadow) to white balance an image correctly or according to artist taste.

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See this link Here's Full Intro about it.

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https://digital-photography-school.com/introduction-to-white-balance/

Sometimes pictures are too yellow or too blue. Therefore, you need a base for balancing out your photos' colors. White is the neutral color to use to balance out your tones. When a camera recognizes the whites in the image it changes the tone accordingly. Try taking pictures with your camera's screen instead of the viewfinder and change the white balance . This way you'll see immediate results without needing to take pictures and evaluate the results. You'll start to understand a bit more as you experiment.

To compensate for the power of color in the picture, in contrast to balance it. This is how white balance works

 

  If you notice that your photos are showing the effect of yellow, we set the white balance based on cold colors such as blue. If, on the contrary, we set the white balance by relying on warm colors such as red in order to achieve the balance we are looking for in the picture

The color of an object is affected by the lighting conditions under which it is viewed. Our eyes and our brain compensate for different types of light—that's why a white object appears white to us whether it's viewed in sunlight, under overcast skies or indoors under incandescent or fluorescent light. But digital cameras need help to emulate this process, to compensate for different types of lighting and render a white object white. The white balance setting is that help.

WB can simply be put as follows:

The white(s) in your photograph(s) should be identical to the original white(s) as seen with bare eyes.

Note: Using a neutral white card in one of your shots makes it easier for you to decide the correct WB later.