Remixing music is something that takes a lot of practice. But if you are passionate about this, then you may be able to produce a good remix. Remixing means you can add a track to your music. It can also mean you can put some filter effect on an extra beat that you might not normally hear in a pre-recorded song. I guess remixing makes the song more personalized.
If you don't want how your original songs sound like then you can use a remix software to adjust the sound of your guitar or drums or cymbals in order to produce the sound that you wish for,