In photography, white balance creates a more realistic and vibrant looking pictures. The objective or aim is to change it to the point of color accuracy.
DSLRs generally come with AWB or auto white balance with which you can adjust the white balance. It is a good starting point if you don't know how to fix it manually.
It offers features such as white fluorescent light, tungsten, daylight, cloudy, shade, flash, color temperature, and custom.
After learning enough about color production and conveniently familiarizing yourself with such multiple settings, you will be eligible to adjust the white balance manually.