BAL is a cryptocurrency used on the Balancer platform, a decentralised finance (DeFi) protocol for trading and creating cryptocurrency liquidity pools. It is an ERC-20 token based on the Ethereum blockchain. BAL is used to govern the platform, allowing holders to vote on proposals to change the platform's code or add new features. It is also used to incentivise liquidity providers, who earn fees from the trades that occur on their pool.