ERC-20 vs ERC-721

A technical standard for fungible tokens on the Ethereum blockchain that defines a common set of rules enabling tokens to interact predictably across wallets, exchanges, and decentralized applications, making ERC-20 the dominant token standard in cryptocurrency.

A technical standard for non-fungible tokens (NFTs) on Ethereum that enables unique, individually distinguishable digital assets where each token possesses distinct characteristics and cannot be exchanged on a one-to-one basis like fungible currencies.