# Boosts

Circuit's vault contracts mint receipt tokens on every deposit. These tokens are ERC-20 tokens, and can be used just like any other token. But remember, they are your receipt! Don't share them or give them away! 

One use-case with these tokens is BOOSTING! 

Boosting is when you can get additional rewards on top of the yield already being earned from depositing assets into the vaults. 

### How do I Boost?

Boosting occurs through a separate boost contract. If the vault is eligible, the app will say so. 

<figure><img src="https://29735739-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FseojiZQF5Y5MagRVWqrP%2Fuploads%2FtUGedvAmpgxZvz6edKE5%2Fimage.png?alt=media&#x26;token=47812c51-e6c9-484f-8c53-f0258384859c" alt=""><figcaption></figcaption></figure>

To Boost, simply deposit into the vault like normal (if you haven't already).&#x20;

On the vault page, scroll down to the Boost card

<figure><img src="https://29735739-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FseojiZQF5Y5MagRVWqrP%2Fuploads%2FP8knktdQnXk8ET3wmmuO%2Fimage.png?alt=media&#x26;token=bb976b5d-094f-4070-982a-893bc482530e" alt=""><figcaption></figcaption></figure>

Then, simply deposit as many vaul tokens as you like. The default is 'max' to earn as much additional rewards as you can.&#x20;

The click 'BOOST VAULT'! That's it!