''Mastering is the art of presenting your mix in the best light possible. It is not about processing, it may be about how NOT to process.'' - Bob Katz
Mastering is the process of refining and polishing a piece of music to ensure it is ready for release. It is an art form that involves enhancing sonic materials, conducting a thorough evaluation of the mix, identifying any problems, and enhancing the overall sound to bring out the best in the material.
When done correctly, your song will feel more alive, loud, and satisfying, giving it that professional sound that listeners expect. Additionally, a good master usually results in a great audio experience on any platform, be it on headphones, speakers, or any other audio source. You get the idea!