Is Binance the same as BNB?

Excuse me, could you please clarify something for me? I've been hearing a lot about Binance and BNB, and I'm a bit confused about the relationship between them. Are Binance and BNB essentially the same thing, or are they distinct entities with different functions? If they're different, could you explain the main differences between them? I'm particularly interested in understanding how they fit into the broader cryptocurrency and finance ecosystem. Thank you in advance for your assistance.