BNB (Build and Build), originally known as Binance Coin, is the native cryptocurrency of the Binance ecosystem. Launched in 2017, it started as an ERC-20 token on Ethereum but later migrated to Binance Chain and Binance Smart Chain (now BNB Chain). BNB is used for trading fee discounts, token sales, DeFi applications, and gas fees on the BNB Chain. With a capped supply of 200 million tokens and a quarterly burn mechanism, BNB aims to maintain scarcity and long-term value. It has grown beyond just a utility token, playing a central role in Binance’s expanding ecosystem and broader Web3 infrastructure.