Acala is a decentralized finance (DeFi) platform built on the Polkadot network. It aims to provide a secure and scalable environment for users to access various financial services, such as lending, borrowing, and trading. Acala's native token, ACA, is used for governance and staking within the ecosystem. The platform features a stablecoin called aUSD, which is pegged to the value of the US dollar. Acala utilizes a unique mechanism to ensure the stability of aUSD, making it a reliable option for users looking to engage in DeFi activities. Overall, Acala seeks to enhance financial accessibility and innovation.