Music by itself is a good relaxent, while listening to music it is proven that your brain and thoughts settle down and you can focus better, depending on the type of music. This being said, music is a great way to help you study. If you have a certain type of chill music, like the bands lifehouse, 3 doors down, or even some rap music, it just depends on what type you prefer.
Listening to music helps get rid of distractions and relaxes your mind, this is why listening to music while driving can be both dangerous or good. Some people while listening to music cannot listen and focus on other things which could cause you to wreck while in a car, or you could be more concentrated, it goes both ways.
Studying is a very complex thing to do. While studying you need absolute concentration. some people get better concentration while having complete silence, as others have to have soft music playing. studies show that most people prefer having a their music on lightly through their headphone while studying, that makes all the sounds around you unnoticable.