Web3 represents the next evolution of the internet — a decentralized, user-owned digital world powered by blockchain technology, smart contracts, and cryptographic ownership. Ethereum is the primary infrastructure layer of Web3.
Decentralized Finance (DeFi) refers to financial services built on blockchain networks — primarily Ethereum — that operate without traditional intermediaries like banks or brokerages. DeFi protocols enable lending, borrowing, trading, yield farming, and liquidity provision through smart contracts.
The Ethereum DeFi ecosystem includes leading protocols such as Uniswap (decentralized exchange), Aave (lending/borrowing), Compound (money markets), MakerDAO (stablecoin issuance), and Curve Finance (stablecoin swaps). Total Value Locked (TVL) in Ethereum DeFi has surpassed $80 billion, representing the largest decentralized financial ecosystem in the world.
Non-Fungible Tokens (NFTs) are unique digital assets stored on the Ethereum blockchain that represent ownership of digital or physical items. Unlike fungible tokens such as ETH or USDT, each NFT has a unique identifier that cannot be replicated. NFTs have transformed digital art, gaming, music, and collectibles markets, enabling creators to monetize their work directly without intermediaries.
The ERC-721 and ERC-1155 token standards on Ethereum power the NFT ecosystem. Major NFT marketplaces including OpenSea, Blur, and LooksRare have facilitated billions of dollars in NFT trading volume.
Decentralized applications (dApps) are applications that run on a blockchain network rather than centralized servers. Ethereum hosts over 4,000 active dApps across categories including DeFi, gaming, social media, identity, and governance. Unlike traditional apps, dApps are open-source, censorship-resistant, and operate according to transparent smart contract rules.
"Best Web3 explainer I have read. The DeFi and NFT sections are especially well-written." — Chris L.
"Helped me understand how to use DeFi protocols safely. Great resource!" — Emma W.
"The dApps directory is incredibly useful for discovering new Ethereum projects." — Ryan M.
