[Data Farming](https://df.oceandao.org) is our dApp that generates yield for participants that curate and publish valuable assets in the Ocean ecosystem.
In order to **gain yield Data Farming**, you will need to lock your OCEAN tokens first! When you lock your OCEAN tokens, you get **veOCEAN tokens** and **weekly passive OCEAN rewards** in return. veOCEAN is a token used in Ocean Protocol's Data Farming dApp to **generate even more yield,** called **weekly active OCEAN rewards**, for allocating your veOCEAN tokens to your favorite assets and get a portion of their sales!
* Select a Lock End Date indicating how many weeks you’re going to lock up your OCEAN tokens. (As the Lock End Date goes farther into the future, your Lock Multiplier increases).
Congratulations! You have now locked your OCEAN tokens for veOCEAN tokens and are generating passive yield automatically. You can [claim your passive OCEAN rewards](claim-ocean-rewards.md) every Thursday - note that your first time claiming rewards will require at least one week, but not more than 2 weeks of wait!