Web3 is the new way of using the Internet in which you have control. Instead of relying on companies like Google or Facebook to save your data or allow you to access services, Web3 allows you to connect directly to applications using your own wallet. You can buy, sell, vote, play or invest without intermediaries and with greater privacy.

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Web3 It is a decentralized internet paradigm based on blockchain technologies that allows users directly interact, own and operate about digital applications and assets, without relying on centralized intermediaries. On a technical level, Web3 is comprised of a set of protocols, libraries and standards —how web3.js, ethers.js, WalletConnect, Siwe, among others— that enable direct communication between frontend interfaces (usually in JavaScript or frameworks such as React) and blockchain networks (Ethereum, Polygon, Arbitrum, etc.).

These tools allow Web3 applications to read chain information, sign transactions, connect to wallets (such as MetaMask, Ledger or Rainbow), manage decentralized identities (DID), interact with smart contracts and build experiences where the user you own your data, tokens and permissions. Web3 allows use cases such as governance in DAOs, decentralized exchanges (DEX), NFT marketplaces, blockchain games, decentralized finance (DeFi), asset tokenization, and sovereign digital identity.

In addition, Web3 integrates passwordless authentication mechanisms (Sign In With Ethereum), open infrastructure such as IPFS or Arweave for decentralized storage, and reputation systems based on on-chain activity. Its development is closely linked to standards such as ERC-20, ERC-721, ERC-1155, and languages such as Solidity. It also poses challenges in terms of scalability, UX, regulation and adoption, but it represents a radical change towards an internet where control passes from the server to the user, from the intermediary to the contract, and from centralized data to data verifiable by all.

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