BNB (Binance Coin) is the native cryptocurrency of the Binance exchange, one of the largest and most popular crypto trading platforms in the world. Initially launched in 2017 as an ERC-20 token on the Ethereum blockchain, BNB later migrated to Binance's own blockchain called Binance Chain. BNB is used for a variety of purposes including trading fee discounts on Binance, transaction fees on Binance Smart Chain (BSC), and participating in token sales on Binance Launchpad. Over time, its use cases have expanded, making it one of the top cryptocurrencies by market capitalization. BNB is also used in DeFi projects, NFTs, and even travel bookings. Its growing ecosystem and strong backing by Binance contribute to its wide adoption and increasing value.