BNB (Binance Coin) is the native cryptocurrency of Binance, one of the world's largest cryptocurrency exchanges. Originally launched in 2017 as an ERC-20 token on Ethereum, BNB later migrated to Binance's own blockchain, BNB Chain. It is primarily used to pay for transaction fees on Binance at a discounted rate, participate in token sales, and power Binance Smart Chain (BSC) applications. BNB also plays a role in decentralized finance (DeFi), gaming, and NFT marketplaces. With a limited supply and periodic burns reducing circulation, BNB remains a key asset in the crypto ecosystem, maintaining strong demand among investors and developers.