TerraUSD (UST) is the decentralized and algorithmic stablecoin of the Terra blockchain, pegged to the US Dollar. Launched in September 2020, UST was created to offer a scalable solution for DeFi, addressing scalability issues faced by other stablecoins. It promises higher scalability, interest rate accuracy, and interchain usage. UST's minting mechanism meets the requirements of DeFi protocols without losing scalability and can be easily integrated into crypto wallets as a payment method. It's also used in DApps as a pricing benchmark for minting fungible synthetic assets. UST can be used with Terra's non-stablecoin crypto, LUNA, or as a standalone token, and has gained a reputation as a highly scalable stablecoin, making it a competitive player in the stablecoin market.