How does BNB work?

I'm quite curious about the inner workings of BNB. Could you please explain how it functions? I've heard a lot about its utility in the crypto ecosystem, but I'm still a bit hazy on the specifics. Does it operate like a traditional currency, or is there something unique about it? Also, how does it interact with other cryptocurrencies and financial instruments? I'd really appreciate it if you could break it down for me in simple terms.