In the contemporary world, it is very easy to mismatch, misuse, and misunderstand everything related to mastering. I have had clients ask whether I can "mix and master" or, even better, "mix-master" the record. I want to point out that mixing and mastering are totally different processes. To clarify, I am not a mastering engineer, but I do/can master songs. If you have a tight budget, but you still want your song to meet today's standards, I will do the job. However, remember that if the song you want to master is recorded or mixed poorly, or the performance is sloppy, the mastering itself will not turn the song into a radio-ready hit single.