White balance is often ignored by most amateur photographers and just left on automatic. The reason we adjust white balance is to get the colors in your images as accurate as possible. Often the auto mode is good enough, but it can commonly get it wrong. You can set white balance manually, usually to:
Tungsten - For indoor lighting, which cools down your photo.
Fluorescent – For warming up your photo if under cool lighting.
Cloudy – Tends to warm everything up.
Flash – Warms up the cool light from your flash.
Shade – This will warm things up slightly due to cooler light of the shade.
To the average "point and shoot" photographer, the auto mode is good enough, but keep in mind the other modes if your photos seem to have incorrect colour tints under different environments.   _{Your Comment}