Glossary
ERC-20
The Ethereum standard interface for fungible tokens — a small set of functions (transfer, approve, balanceOf, …) that lets any wallet or DEX support any token.
ERC-20 is a minimal interface that an Ethereum smart contract
implements to behave like a fungible token. The standard fixes a
handful of function signatures (transfer, approve,
transferFrom, balanceOf, totalSupply) and two events
(Transfer, Approval).
Because every wallet, exchange, and DeFi protocol knows that interface, a brand-new token can plug into the entire ecosystem the moment it is deployed — no per-token integration required.