What’s the difference between private use and public use?

‘But surely I’ve already paid for my CDs and my Spotify subscription?‘ you might think. That’s true. But the price you’ve paid for radio, CDs or music services is for private use only. If you play music to your employees or customers, then you are playing music in public. In this case, you have to pay a fee to BumaStemra and Sena (Foundation for the Exploitation of Neighbouring Rights).