yToken represents a liquidity token issued in return for the deposit(s) of an investor. yTokens are used for a number of uses in Yearn Land products, including lending, liquidity insurance (yCover), and automated, optimized yield farming (yVault).
When you deposit into any yearn operation, it is rolled up and returned as a yToken reflecting the liquidity given
As example, you will receive yDAI in return if you deposit DAI into y.curve.fi
The amount of yToken and the token deposited will differ as the yToken represents a share of a pool which is increasing in value
You can get a yyToken back if you deposit a yToken in another yearn service
LP token for Yearn Land's yCRV yVault
aka yyCRV
or yyDAI+yUSDC+yUSDT+yTUSD
When you deposit yCRV into the yVault you receive yUSD**** LP tokens
Earns interest through yCRV, fees and incentives for yield farming through the yVault strategy
LP token for Yearn Land's Y pool at Curve.fi/y
Aka yDAI+yUSDC+yUSDT+yTUSD
Interest receiving token reflecting your share of DAI, USDT, USDC, and TUSDC in the Y pool