What is ERC-20?
ERC-20 standard was created by Vitalik Buterin and Fabian Vogelsteller in 2015. The acronym stands for Ethereum Request for Comments. ERC-20 are tokens that do not have their own blockchain and use the Ethereum blockchain instead. For example, Dai, Synthetix, Aave, or Uniswap tokens operate on the Ethereum blockchain.
These tokens are subject to certain rules. They generally define the currency behaviour so that the tokens function as well as possible and are compatible. Most Ethereum blockchain tokens use the ERC-20 standard. All ERC-20 tokens can be sent to the same Ethereum wallet and may be inherently fungible.