Yield Guild Games is a decentralized autonomous organization (DAO) that aims to invest in virtual world and game-based non-fungible tokens (NFTs). The organization started off as a scholarship program of the well-known blockchain game, Axie Infinity.
The YGG token is an ERC-20 token that can be used to participate in the governance of this organization.
You can click this link to learn more about Yield Guild Games and the YGG token.