Pickle Finance is a yield aggregator that compounds LP positions across multiple chains:

Opportunities for yield farming within DeFi keep changing, and Pickle Finance curates a set of Pickle Jars and Pickle Farms built to generate yield using particular assets and through specific DeFi protocols. Jars function like yearn.finance vaults. A jar takes in a designated asset (typically an LP token), for example sLP ALCX/ETH (the liquidity provider token for the ALCX/ETH pool on SushiSwap), and applies an earnings strategy created by the Pickle Finance team to that asset. As your deposit auto-compounds, your balance of the asset grows. Even so, jars can’t stop the value of your asset from declining versus USD.

Farms come after you place an asset into a jar. Once you deposit an asset into a jar-such as sLP ALCX/ETH-you receive pTokens (for instance, pSLP ALCX/ETH) that reflect your portion of the jar’s holdings. You can then stake those pTokens in the corresponding farm to earn extra PICKLE rewards in addition to the rewards you already receive. If you lock existing PICKLE tokens for DILL, your PICKLE rewards can be increased for as long as four years.