# 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="/files/DnuUHDJSgHvZfjjAdPgb" 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="/files/tVCuPBBN6u6zQ5M50fAc" 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!


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