ERC-721 is a non-fungible token standard that facilitates the creation of NFTs and has a wide range of applications in gaming, art, collectibles, etc. These tokens are non-fungible, meaning that they cannot be exchanged on a one-to-one basis due to their unique properties.

The ERC-721 standard consists in a set of functions that can be used in the smart contracts by developers to create, transfer, and manage NFTs. These functions allow for the creation of unique tokens with their own metadata, making them distinguishable from one another. ERC-721 smart contracts maintain a record of token ownership, allowing for the transfer of tokens between users.

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