What is DeFi Protocol?
A DeFi protocol is a set of smart contracts implementing a specific financial service on blockchain — such as lending, trading, derivatives, or asset management — accessible to anyone without intermediaries.
WHY IT MATTERS
DeFi protocols are the applications of decentralized finance. Each protocol implements a specific financial primitive: Aave for lending, Uniswap for trading, MakerDAO for stablecoin issuance, Lido for staking.
Protocols differ from traditional financial services in key ways: permissionless (anyone can use them), transparent (code is open and on-chain), composable (protocols build on each other), and non-custodial (users maintain control).
The protocol landscape includes: lending/borrowing, DEXs, derivatives, stablecoins, yield aggregators, insurance, and cross-chain infrastructure. Each category has multiple competing protocols, creating a competitive market.