As a content creator, you'll definitely need music to use in your videos, podcasts or whatever, and you really don't want to use music that has copyrights as your video would probably be deleted, and you'd receive a strike, so it's a threat for your business.
This library will provide you with music that has no copyrights for personal use, to use them in your own content, but not to redistribute it, if you want to redistribute this is a whole different story.
So the first option we have today is Jamendo, which is a library that contains tons of all types of music and audio effects that you'll essentially need to create content.
All what you have to do is to register a free account on Jamendo
and download your free music without restrictions, and as I said I'm talking about using this music in content or as a background music, but if you want to redistribute it you'll have to subscribe to their service and pay for the music you pick.
Another option is Youtube Music Library, simply all what you want to do is type "Youtube music library" on Youtube's search, and you'll find thousands if not millions of music tracks, also use Videoder (link for article) to be able to download these music in mp3 or mp4 formats, and you'll also be able to choose high or medium quality while downloading.
So without making this long, those are the 2 options you'll only need I guess, and we'll be adding more soon.
Hope this was helpful, I wish you a great journey with content creation, and thanks for your precious time.