BNB, or Binance Coin, is a cryptocurrency created by Binance, one of the largest cryptocurrency exchanges in the world.

Originally launched as an ERC-20 token on the Ethereum blockchain, it has since migrated to Binance's own blockchain, the Binance Chain.

BNB is used for various purposes on the Binance platform, including paying for trading fees, participating in token sales, and more.

It also has utility beyond the exchange, such as in decentralized finance (DeFi) applications and payment systems.