# Reviews

TalentLayer ID’s build their reputation over time through receiving Reviews from counter-parties; people that have engaged in transactions as either a buyer or seller.

A Review is an ERC 721 soulbound NFT that is associated with a TalentLayer ID. New Reputation NFTs are minted whenever a service is completed on TalentLayer. They include information about the service completed and a review from the other party. A TalentLayer ID can have an unlimited number of Reputation NFTs. Service buyers leave Reputation NFTs for service sellers and service sellers leave Reputation NFTs for service buyers - a mutual-review system.

## Learn More About The Tech

Learn more about the technical side of reviews in our Technical Guide on the smart contract.

{% content-ref url="../../technical-guides/lower-level-guides/smart-contracts/talentlayerreview\.sol" %}
[talentlayerreview.sol](https://docs.talentlayer.org/technical-guides/lower-level-guides/smart-contracts/talentlayerreview.sol)
{% endcontent-ref %}