What is Web3 and Why It Matters

A Web3It represents the upcoming evolution of the Internet — a decentralized version where users control their own data, assets and digital identity. While Web1 (90s) was only reading and Web2 (2000s) brought interaction with platforms like Google, Facebook and Instagram, Web3 eliminates intermediaries using blockchain technology.

In practice, this means that instead of entrusting your data and money to a centralized company, you interact directly withDecentralized Applications (dApps)No one can censor your account, freeze your funds or sell your data without permission.

How Web3 works in practice

The basis of Web3 isBlockchain networks, such as Ethereum, Solana and Polygon. These networks function as decentralized global computers, running programs calledIntelligent contracts (smart contracts)Self-executable codes that set rules and process transactions automatically.

When you use a Web3 app, instead of logging in with email and password, you connect yourThe digital walletThis wallet functions as your identity, bank account and access key, all in one place.No company controls your wallet — you have total sovereignty over your assets.

Digital Wallets: Your Passport to Web3

The digital wallet is the first step to entering the Web3.The most popular options include:

  • by MetaMask:The most widely used wallet, available as a browser extension and mobile app. Supports Ethereum and EVM compatible networks
  • Good wallet:Integrated with Brave browser, no need to install extensions. Supports Ethereum and Solana
  • The Phantom:Focused on the Solana ecosystem, with intuitive interface and support for NFTs
  • Rabby WalletA security-focused wallet that simulates transactions before execution to prevent fraud

When you create your wallet, you will receive aSeed phrases (seed phrases)— usually 12 or 24 words that function as the master key of your wallet. This phrase should be kept with absolute security, preferably written on paper and stored in a safe place.

First steps in Web3 in 2026

To start your journey on Web3, follow these practical steps:

  1. Set up a wallet:We recommend MetaMask or Brave Wallet for beginners
  2. Keep your phrase:Note on paper and store it in a safe place. Never share it with anyone.
  3. Added funds :Buy ETH or MATIC on a Brazilian exchange and send it to your wallet
  4. Explore Layer 2 networks:Configure networks such as Arbitrum or zkSync in your wallet to pay minimum fees
  5. Interacting with dApps:Visit sites like Uniswap, Aave or OpenSea and connect your wallet to try

Types of Web applications

Decentralized Finance (DeFi)

DeFi is the most mature sector of Web3, allowing loans, token exchanges and income without bank intermediaries.Aaveborrowed andUniswapDecentralized exchanges process billions of dollars daily.

Not Fungible Tokens (NFTs)

NFTs are unique digital assets that represent ownership of items such as digital art, music, tickets and game items. Marketplaces such as OpenSea and Magic Eden allow you to buy, sell and trade NFTs.

Decentralized Autonomous Organizations (DAOs)

DAOs are communities governed by on-chain voting, where token holders vote on protocol decisions, from treasury allocation to technical updates.

Decentralized digital identity

Projects such as ENS (Ethereum Name Service), Worldcoin and Lens Protocol allow you to create digital identities that you control without relying on companies like Google or Facebook.

Web Security 3: How to Protect Yourself

Decentralization brings freedom but also responsibility. On Web3, there is no “forgot my password” or customer support that can reverse transactions.

  • Never share your phrasesNo one, under no circumstances
  • Check the URLsBefore connecting your wallet — phishing scams are common
  • Use of hardware wallets(Ledger, Trezor) for significant values
  • Start with small valuesLearning without risks
  • Revocation of old approvalsperiodically using tools such as Revoke.cash

Web3 is rapidly evolving and offers unique opportunities for those who are willing to learn. Start with the basics, explore cautiously and build your knowledge gradually.