Web3

What Is Web3?¶

Web3 (Web 3.0) is the next generation of the internet built on blockchain technology, aiming to create a decentralized network ecosystem where users have sovereignty over their own data. Unlike the traditional internet (Web2), where large technology companies control data and services, Web3 leverages blockchain, cryptocurrency, and smart contract technologies to enable peer-to-peer value transfer and decentralized application operation.

In the Web3 world, users are no longer merely platform consumers but true owners of the network. Users can control their digital identity and assets through wallets, participate in application governance, and benefit from the value they create. Web3 represents the evolution of the internet from "read-only" (Web1) to "read-write" (Web2) to "read-write-own" (Web3).

Core Characteristics of Web3¶

Decentralization¶

Web3 applications run on blockchain or peer-to-peer networks, without relying on a single centralized server or organization. Data and application logic are distributed across multiple nodes, avoiding single points of failure and centralized control. Users can interact directly with smart contracts without going through intermediary platforms.

User Sovereignty¶

In Web3, users have complete control over their digital identity, data, and assets. Through private keys and wallets, users can autonomously manage their accounts and decide how their data is used. Unlike Web2, where platforms own user data, Web3 gives users true data ownership and control.

Permissionless¶

Web3 applications are typically open and permissionless -- anyone can participate, use, and build without requiring approval from a centralized authority. Developers can freely deploy applications on blockchain, users can freely access these applications, and creators can freely publish content and assets.

Value Internet¶

Web3 enables the digitization and programmability of value through blockchain technology. Digital assets such as cryptocurrency, NFTs, and tokens can flow freely across the network, and users can exchange value directly peer-to-peer without traditional financial intermediaries.

Transparent and Verifiable¶

Web3 application code and transaction data are typically publicly transparent, and anyone can view and verify them. Smart contract execution logic is written on-chain and is immutable, ensuring fairness of rules. Through block explorers, users can trace the complete history of every transaction.

Differences Between Web3 and Web2¶

Key Technologies of Web3¶

Blockchain¶

Blockchain is the infrastructure of Web3, providing decentralized data storage and computing capabilities. Major blockchain platforms include Ethereum, Bitcoin, Solana, Polkadot, and others, each making different tradeoffs in performance, security, and degree of decentralization.

Smart Contracts¶

Smart contracts are self-executing programs that run on blockchain and serve as the core logic layer of Web3 applications. Developers can write smart contracts using languages like Solidity and Rust to build DeFi, NFT, DAO, and other applications.

Cryptocurrency and Tokens¶

Cryptocurrency and tokens form the foundation of the Web3 economic system, serving as stores of value, mediums of exchange, and incentive mechanisms. Users can manage these digital assets using wallets and trade them through decentralized exchanges (DEXs).

Decentralized Storage¶

Traditional centralized storage is vulnerable to censorship and single points of failure. Web3 uses decentralized storage protocols such as IPFS, Arweave, and Filecoin to achieve distributed and permanent data storage.

Decentralized Identity¶

Identity in Web3 no longer depends on centralized platforms. Technologies such as DID (Decentralized Identity) and ENS (Ethereum Name Service) allow users to own and control their digital identity.

Web3 Use Cases¶

Decentralized Finance (DeFi)¶

DeFi is the most mature application area of Web3, including decentralized exchanges (such as Uniswap), lending protocols (such as Aave), stablecoins (such as USDC), and more, enabling users to conduct financial activities without intermediaries like banks.

NFTs and Digital Assets¶

NFTs (Non-Fungible Tokens) represent unique digital assets, with applications in digital art, gaming items, virtual land, identity credentials, and more. Through NFTs, creators can directly benefit from their work.

Decentralized Autonomous Organizations (DAOs)¶

A DAO is an organizational structure based on blockchain that achieves democratic governance through smart contracts and token-based governance. Members can participate in organizational decisions through voting, and fund management is transparent and open.

Web3 Social¶

Web3 social platforms (such as Lens Protocol and Farcaster) give users ownership of their social data and relationship networks, allowing free migration between different platforms and avoiding platform lock-in.

GameFi and the Metaverse¶

GameFi combines gaming and finance, allowing players to truly own game assets and profit from gameplay. Metaverse projects build virtual worlds where users can socialize, create, and trade.

Why Is Web3 Important?¶

Return of Data Sovereignty¶

In the Web2 era, users' data was collected, controlled, and monetized by large technology companies, while users could not benefit from it. Web3 puts users back in control of their data, allowing them to decide how their data is used and shared, achieving the return of data sovereignty.

Value Creators Benefit¶

Web3 changes the value distribution model, enabling content creators, developers, and community contributors to directly benefit from the value they create, rather than having most of the revenue extracted by platforms. Through token incentives and NFTs, creators can receive fairer returns.

Reduced Trust Costs¶

The traditional internet requires trust in centralized platforms and intermediaries, while Web3 establishes a "code is law" trust mechanism through blockchain and smart contracts. The execution of transactions and agreements does not rely on human intervention, significantly reducing trust costs and transaction friction.

Promoting Innovation and Competition¶

The permissionless nature of Web3 lowers barriers to innovation -- anyone can build applications on blockchain. Applications can compose and integrate with each other, creating "money lego" effects that foster innovation and healthy competition.

Censorship Resistance and Freedom of Expression¶

The decentralized architecture makes Web3 applications difficult for any single entity to censor or shut down, providing stronger protections for freedom of expression and information flow. This is particularly important in authoritarian regimes or regions with restricted speech.

Financial Inclusion¶

Web3 lowers barriers to financial services -- anyone with an internet connection can use DeFi services without needing a traditional bank account. This provides financial service opportunities for the billions of unbanked people worldwide.

Challenges of Web3¶

While Web3 has broad prospects, it still faces many challenges:

• User Experience: Compared to Web2, Web3 has a higher barrier to entry. Wallet management, private key custody, transaction confirmations, and other operations are not user-friendly enough for average users.
• Performance Bottlenecks: Blockchain transaction speed and throughput still cannot match the traditional internet. Layer 2 and other scaling solutions are working to address this issue.
• Regulatory Uncertainty: Countries differ in their regulatory stance on cryptocurrency and Web3, and legal frameworks are still incomplete, creating uncertainty for the industry.
• Security Risks: Smart contract vulnerabilities, wallet theft, phishing attacks, and other security issues occur frequently. Users need stronger security awareness.
• Energy Consumption: Early PoW consensus mechanisms had enormous energy consumption. Although Ethereum has transitioned to PoS, environmental concerns remain relevant.

Summary¶

Web3 represents a new stage in the evolution of the internet, achieving decentralization, user sovereignty, and a value internet through blockchain technology. It is reshaping our relationship with the digital world, transforming users from passive consumers into active owners and participants. Although Web3 is still in its early stages and faces many challenges, the ideas and technology it represents are driving the internet toward a more open, fair, and inclusive future.