[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 **Volume DF rewards**, for allocating your veOCEAN tokens to your favorite assets and get a portion of their sales!
- Enter the amount of OCEAN tokens that you are going to lock up
- 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).
- Click on the checkbox to agree to the disclaimer.
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!