Just about everyone can admit to having different sets of music to listen to. Whether it be playlists, a specific artist, or even just a specific genre, people tend to listen to more than just one type. You may not even realize it, but most of the time the different
varieties of music you listen to often correlate with a particular emotion that you may feel during specific times.
When you go and make a playlist, you usually have an idea in mind of what you want that playlist to "sound like." In other words, you usually try to create a specific theme within that playlist, whether it be a specific genre, or maybe a specific style or way of playing that genre, or even just music that you randomly hear and want to save.
Now think about when you listen to that playlist. Is it when you are feeling happy? Or maybe is it for when you are feeling low. Maybe it's a playlist to get you pumped up for a workout. Or maybe it's just what you put on while you're driving. Regardless of what you use it for, that playlist has a purpose, otherwise you wouldn't have created it in the first place. You may not even realize the purpose, but that collection of songs changes how you feel while it's playing. It impacts your emotions in ways that only make sense to you. You saved those songs because you felt like they were more important than the rest that you heard.
That's the thing about music: you can make it whatever you want it to be. If you don't like a certain song, you don't have to save it to your playlist. If a specific song does stick out to you, then you would save it. When you then apply how a song makes you feel, it can say a lot about you in that moment. For example, if you were to listen to a sad song, but you don't instantly skip it, that shows that maybe something about that song (maybe the lyrics, or even just the tone) is explaining how you feel right there and then. The song is describing your current state of emotions in a way that rings true to you specifically.
Obviously, this example is a bit particular, and many times you may just say that you listen to a song just because it's a good song, nothing more. But again, you can still apply that logic, because maybe it says that you're happy when listening to music (again, just an example). It could just be that music simply relieves you from whatever you're dealing with, and that it's just something you can simply appreciate for what it is. And that's the beauty of music: it can be whatever you want it to be. If you only want to listen to it to relax, that is totally acceptable. If you use it as a form of escape, that is also acceptable. It is something you can fully control and bend to your liking, allowing you to use it for however you want to.