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Key Points
Through DeFi, users only need a wallet and some cryptocurrencies to enjoy cryptocurrency financial services. Decentralized applications (DApps) can realize functions such as lending, liquidity provision, exchange and staking on most blockchains.

Although DeFi originally originated on Ethereum, today, most blockchains with smart contract capabilities can host DeFi DApps, including Layer-2 solutions such as Arbitrum and Optimism. Smart contracts are essential for the staking, investing, lending, and yield services provided by DeFi.
DeFi can help users optimize yields, access decentralized markets, gain access to banking services, and increase borrowing speed. However, DeFi is not risk-free; please do your research carefully before taking risks.