Web3 (Web 3.0) is the idea of a more decentralized internet built around blockchain, crypto, smart contracts, and user-owned digital assets.

Key areas of Web3

🔗 Blockchain — decentralized networks such as Ethereum, Solana, and BNB Chain

💰 Cryptocurrency — BTC, ETH, stablecoins, and other tokens

🤝 DeFi — decentralized lending, trading, staking, and financial applications

🎨 NFTs — blockchain-based ownership of digital assets

🏗️ DAOs — community-governed organizations

🎮 Web3 Gaming — blockchain-based games and digital assets

🧠 AI + Web3 — decentralized AI infrastructure, agents, and data ownership

🪪 Decentralized Identity — identity and credentials controlled by users

Simple example:
Web2 → You use a platform and the platform controls your account/data.
Web3 → A wallet can act as your identity, and blockchain networks can record ownership and transactions without relying entirely on one central platform.

If you're learning Web3 for crypto/content creation, a useful roadmap is:
Blockchain → Wallets → Smart Contracts → DeFi → NFTs → DAOs → Web3 projects → On-chain research.