The Curve protocol employs a unique Automated Market Maker that combines Uniswap's constant product AMM with a constant sum AMM. Curve's AMM equation is complex but the results are simple – low slippage on small to medium trades and decent liquidity on larger ones.
All LPs receive CRV tokens in addition to the interest from fees. When depositing LPs should put assets in pools in an equal ratio (50/50). If they don't the AMM equation will devalue one of the coins letting arbitrageurs bid some of the value out of their deposit.
On top of the fee paid to LPs, Curve incentivizes deposits via rewards from other DeFi projects. Currently, protocols REN and Synthetix encourage LPs to deposit in pools containing their assets by giving LPs their respective tokens ($REN and $SNX).
An EVM (Ethereum Virtual Machine) compatible version of Curve is being built on Polkadot. The team behind Polkadot's Curve is not affiliated with Curve itself.
Curve Finance has integrated with 1inch, Paraswap, Totle swap Dex.ag, Debank, InstaDapp DSA, CoinGecko, Zapper.fi, Zerion, Pools.fyi, Spells.fyi, dydx, Etherscan, and CoinMarketCap. Use of Native tokens in the ecosystem: CRV token is used to pay liquidity providers. It can be used for staking and making governance votes as well.