What is the difference between BNB and Binance?

Excuse me, could you please clarify the distinction between BNB and Binance for me? I've been hearing a lot about both, but I'm still a bit confused about the difference. Is BNB simply a type of token or currency used within the Binance ecosystem, or is it something more? And what exactly does Binance represent? Is it a platform for trading cryptocurrencies, or does it have other functionalities as well? I'm trying to get a better understanding of these two terms and how they interrelate in the world of cryptocurrency and finance. Could you please elaborate on this for me? Thank you in advance for your help.