Purpose of Mastering
Audio mastering is the art of giving your recording a cohesive and professional sound.
It should sound its best in a variety of different listening situations; such as on a home stereo, the radio or internet, in the car or through headphones. Naturally, it should be able to stand up in comparison with other productions.
The resulting final files must be technically perfect and free of artifacts or clippings. Aesthetic considerations aside,the main purpose of audio mastering is to ensure the most optimal sounding production as possible.