Blockchain
Many computers keep copies of the same record. On a public blockchain, people can inspect transactions instead of relying only on a private database.
In practice: You can check whether a token moved from one address to another.
A field guide for the curious
Find your way
through Web3.
A lot of Web3 talk starts in the middle. Let's start at the beginning: what it is, why people care, and what to watch out for.
No jargon required. No wallet required either.
START HERE ↓THE OPEN WEB, EXPLAINED
01 / The big idea
An internet you can take part in.
Web3 is a broad idea: use shared networks so an online service doesn't have to depend entirely on one company's database.
In some Web3 apps, a wallet lets you hold digital assets and use the same account in more than one place. People also use blockchains to make records and rules visible to anyone who wants to check them.
That doesn't make every project open, safe, or useful. It does give builders a different set of tools.
Web1Read
Visit pages and find information.
Web2Read + write
Post, connect, and create on platforms.
Web3Read + write + participate
Use wallets and shared networks where they add value.
These labels are a useful shorthand, not strict eras. All three kinds of experience still exist together.
02 / How it works
Three pieces to know first.
A typical Web3 app combines a place to keep a record, a way for you to approve actions, and code that defines what happens next.
Wallet
A wallet manages your blockchain account. It asks you to approve a connection or sign a request, so you stay in charge of when an app can interact with it.
In practice: You connect to an app without creating another password for that app.
Smart contract
A program stored on a blockchain. When called, it follows the rules written in its code. Anyone can use compatible apps to interact with it.
In practice: A group can set rules for how a shared treasury is used.
Put together: Your wallet approves an action, a smart contract handles it, and the blockchain records the result.
03 / What people build
More than coins.
Web3 covers money, culture, coordination, and software. Here are four common directions, without the sales pitch.
Move value
Digital currencies can be sent between people on a blockchain. Fees and prices can change, sometimes quickly.
Prove a token is yours
An NFT is a unique token that can point to art, a ticket, or a membership. Owning it doesn't automatically give you copyright.
Coordinate a group
Some online communities use shared rules and voting to manage decisions or funds. How much power members get varies.
Build on shared tools
Apps can use blockchains and smart contracts. Some let you bring the same wallet or digital items to other compatible apps.
04 / Keep your bearings
Interesting tools.
Real tradeoffs.
The best way to explore Web3 is with curiosity and a few good questions.
Who is really in control?
“Decentralized” is a spectrum. Check who runs the app, who can change its rules, and where your data is kept.
What am I approving?
A wallet connection shares your public address. A signature or transaction can do much more. Read the request before you approve it.
Can this be undone?
Blockchain transactions are often difficult or impossible to reverse. Smart contracts can also contain bugs.
Your first interaction
Try a wallet connection.
This demo asks MetaMask for permission to show your public account address. It does not sign a message, make a transaction, or move funds.
- Use a browser with MetaMask installed.
- Unlock MetaMask and select the button.
- Read the request before you approve it.
WALLET DEMO
Your wallet stays yours.
Connecting only lets this page see your public address. You can decline and keep reading.
Not connected. No wallet is needed to explore this guide.
Never enter your recovery phrase on a website.
Before you go
A few good questions.
Do I have to buy crypto to learn Web3?
No. Reading about it and exploring many public records costs nothing. Some app actions require network fees, but this page does not.
Does connecting a wallet spend money?
No. A connection request asks for access to your public account address. Signing messages, approving contracts, and sending transactions are separate requests to review carefully.
Is Web3 replacing the rest of the internet?
Probably not as a clean swap. Web3 tools often work alongside familiar websites and services. Whether they help depends on the problem being solved.