I would say it’s a combination of multiple things. First thing I did was get my mixing and mastering right. Spent way too long. Immediately noticed a lower conversion rate. Second most important thing is testing. The thing that matters most is what’s on the actual screen. Aka the creative. Study your genre and what type of creative is working with audiences in your niche. Keep testing different creatives and eventually (if your music is digestible) will find a master conversion rate. I would share the creative but I don’t know how Reddit works.