The "Free" version will likely have a producer tag (a voice saying the producer's name) every 30-60 seconds. Do not remove this, as it's a requirement for free usage. 5. Mixing Your Vocals
To freestyle or write effectively, you need to recognize the "Skeleton" of the beat, as described in guides like Melodics' Beatmaking 101 . The "Free" version will likely have a producer
You can usually post it on YouTube or Soundcloud, but you cannot monetize it or put it on Spotify/Apple Music without buying a license. The "Free" version will likely have a producer