https://www.techradar.com/news/the-a-to-z-of-photography-white-balance

White balance is a camera setting that adjusts the color balance of light the you’re shooting in so that it appears a neutral white, and it’s used to counteract the orange/yellow color of artificial light, for example, or the cold light of deep shadow under a blue sky so that portrait shots taken in shade look more natural.

All digital cameras have an auto white balance setting that analyses the colors in a scene and neutralises them automatically. Mostly it does a very good job, though there are occasions when you need to override the auto white balance setting and choose a setting yourself.