Curve is a software that uses multiple cryptocurrencies to operate an automated market making service focused on stablecoins (cryptocurrencies programmed to mimic other assets).
One of a number of emerging decentralized finance (DeFi) protocols built on Ethereum
Curve facilitates trading not using a central order book, but rather pools of cryptocurrencies provided by users, who in turn can earn fees through their deposits.
Like Uniswap or Balancer, Curve gives cryptocurrency users a way to earn fees on their assets
while letting traders buy and sell those assets at potentially better prices.