What’s the importance of Sound cloud.

I love music and I am dying to do something significant on earth, something that will stay even after am gone and I strongly believe on YouTube as the platform to get me something or reach people as because everyone has access to it. But for some time now I see real people posting and trying to grow their sound loud channels predominantly. I don’t know how it benefits them. I can ask AI but I really would prefer honest answers from real people. humans with experiences and advices.