What Is Web3? The Complete Guide to the Decentralized Web

Web3 or Web 3.0?! It mostly depends on your generation… The fact remains that the word is on everyone’s lips, and I doubt the successive crises can change anything about the inevitable rise of Web3.

Ever since the term Web3 emerged to describe a new type of protocol enabling decentralized consensus, it has come to describe an entire ecosystem of public blockchains, decentralized applications (dApps) and even design philosophies for the web of tomorrow.

As with other big esoteric ideas, the question “What is Web3?” draws answers as varied as the people articulating them. For some, new jargon can be a real barrier, especially when you’re just getting started in the world of blockchain and cryptocurrencies.

That’s why we’ll cover nine key ideas that describe Web3, built around several concrete examples that let us grasp these concepts in practice and break away from the abstract. If you’re new to crypto, we also recommend checking out our complete guide to Bitcoin and our guide to Ethereum, two fundamental building blocks of Web3.

Article updated in 2026: the conceptual foundations of Web3 (decentralization, ownership, identity) still hold, but we’ve re-contextualized the market-related passages (NFTs, identity tools, platforms) to match today’s reality, after the 2021-2025 cycles.

Web3: the 9 essential definitions to understand it all

1. Web3 is the trendy new name for the decentralized web.

2. Web1 is read-only, Web2 is written and read, Web3 is owned, written and read.

3. Web3 enables the transfer of value over the internet.

4. Web3 protects your identity on the internet.

5. Web3 is a response to social networks that publish our personal information without any control, selling it to the highest bidder in an automated way.

6. Web3 lets artists and creators secure their property and control how it’s sold.

7. Web3 constitutes a new model of patronage for the internet.

8. Web3 makes it easier to set up community structures and cooperative governance.

9. Whatever anyone says, Web3 isn’t perfectly decentralized yet.

1. Web3: the new name for the decentralized web

Web3 is neatly illustrated by the fact that MetaMask has become one of the main ways individuals can access the Ethereum blockchain, and many other Ethereum-compatible networks.

It lets you securely generate a public key on your phone or computer, but above all it opens the way to a new principle of interacting with the web: you’re the only one with access to your accounts and your data, and the only one who can choose what you want to share and what should stay private.

Another way to describe MetaMask would be to call it a cryptographic consent manager. If you want to get hands-on, follow our tutorial to create your first MetaMask hot wallet step by step and understand the logic of private keys. To buy your first crypto before transferring it to a wallet like MetaMask, you can go through a regulated, well-established platform: we generally recommend buying your first crypto on OKX before moving to self-custody, one of the most reliable exchanges on the market for getting started with peace of mind.

2026 update — MetaMask leads, but no longer alone. MetaMask remains one of the most widely used wallets in the Ethereum ecosystem (on the order of several tens of millions of monthly active users), but it’s no longer the only entry point: the competition has grown with Rabby, Phantom (on the Solana side and multi-chain), as well as a new generation of “smart wallets” built on account abstraction (see below). The principle stays the same: one key, one wallet, and you keep control.

When you refer to the decentralized web, you’re also referring to everything else, which goes well beyond the decentralized management of money and identity.

Other aspects of the decentralized web, such as data storage, are emerging as essential parts of Web3 — for example permanent file storage (like IPFS and Arweave), decentralized storage (Golem, W3BCloud, etc.) or decentralized data with Graph Protocol.

Today, the term Web3 is a real hook for a whole category of investors and VCs (the venture capitalists, those funds that invest very early in tech projects).

That means it’s also the subject of long, ironic threads, full of mockery but often confused.

It was only a matter of time before Web3 took up enough space on the internet for the clowns to start criticizing the innovative minds.

2. Web1, Web2, Web3: the evolution toward an internet owned by its users

If you asked a technical person what Web3 is, they’d probably answer with the heading above.

From Web1 to Web2: from read-only to the interactive web

The web, in its initial version, relied on open source protocols such as TCP, IP, SMTP and HTTP.

A protocol is a standard way for several computers to agree to communicate with each other. These fundamental protocols govern the flow of information and messages across the internet.

As a reminder, the fundamental advantage of open source is that it’s free.

Web2 (back then people said Web 2.0) actually describes the evolution achieved thanks to openly accessible protocols.

One important change is that, unlike the static “read-only” versions of sites that made up the first version of the web, individuals can add content to the web. This is the advent of the interactive web. What started out as nothing more than upvotes became microblogging and, today, it means more than 2 billion Facebook profiles, among other things.

Another subtle but fundamental change also occurred. Rather than asking you to pay to maintain your own server and host your websites, Web2 companies decided to foot the bill. In exchange, they created a data silo that logs user behavior to build social profiles that became extremely valuable to advertisers.

A well-known conclusion: with Web 2.0, the individual user became the product!

Web3: ownership handed back to users

On Web3, ownership is decentralized; this means that the builders, operators and users of a platform own a share of what they use.

Bitcoin and Ethereum are the first examples: in exchange for updating the ledger and keeping the other participants honest, they receive a reward in BTC or ETH for securing the network.

Token-based networks built on ERC-20 (the fungible token standard on Ethereum) and other blockchains offering smart contracts have even introduced new ownership models that aren’t necessarily the same as those of cooperatives or joint-stock companies.

For example, ownership can be granted in the form of a token provided for a service, such as supplying liquidity for a transaction, and that same token can also be used to govern future changes to the network. The grand vision is that participants in a network will be able to own a share of the products and services they use every day.

3. Web3 and value transfer: digital scarcity finally made possible

One of the internet’s greatest innovations was to deliver massive information that is globally accessible, cheap and free. These features stand in direct opposition to the principle of value creation — whether money or property — which are by definition scarce and hard to access.

Bitcoin and the double-spending problem

Bitcoin is the first protocol to introduce scarcity on the internet, notably by solving the “double-spending” problem that had plagued the earliest attempts at digital money. The double-spending problem refers to the idea that you could duplicate digital money and spend it simultaneously in two or more places.

In the traditional financial world, banks, credit card companies and payment processors validate transactions themselves in order to minimize the risk of double-spending.

In the case of decentralized crypto, it’s the network of miners or validators that takes on the job of checking that an account isn’t double-spending. The implications are profound, since verification no longer relies on a “trusted” centralized party. With an internet connection, anyone can take part in the peer-to-peer network and inspect the ledger. Finally, consensus protects against potential dishonest coalitions seeking to reverse or censor transactions.

Fungible or non-fungible: the birth of NFTs

For any real scarcity to appear, we also need genuine fungibility. Fungibility means you can swap one unit for another and it still has the same value. For example, 1 ETH is worth 1 ETH.

Non-fungible means each unit is unique. NFTs give users the ability to own items, which can be artworks, photos, music, text, in-game items, identifiers, governance rights, access cards.

Fundamentally, what matters is that the blockchain keeps a record of ownership from one account to another. It lets an artist or a company establish the “original” and, much like the fundamental problem blockchains solve, it prevents someone else from claiming to be the owner or “spending it twice”.

One of the reasons so many people got hooked on NFTs is simply that they’re a way to prove digital provenance, because they really are Ethereum tokens and others like Solana.

They’re interoperable with the rest of the Web3 ecosystem. They can be split into small fractions so that several people can own them, used as collateral for other decentralized financial services (DeFi), include perpetual royalties and even be used as a basis for identity on the internet.

4. Web3 and digital identity: taking back control of your data

One of Web 2.0’s great omissions — one that suits the big players just fine — is that we carefully forgot to define the notion of personal data ownership.

That was missing, and it’s exactly one of the essential things Web3 brings: you take back ownership of your digital identity.

Web3’s position is that you should own your own online identity and only reveal parts of that identity when you decide to. In practice, an identity on Ethereum is very basic. Think of it as a container to which claims can be attached. A government could attest to your date and place of birth without learning anything else about your digital identity that you haven’t consented to. Your identity could include your transaction history, which a financial service could query without needing to know where you were born. On top of that, the digital identity you build on one social network could be transferable to other networks, and so on.

ENS: the human-readable identity of Web3

In practice, the closest thing to a universal identity layer in Web3 is the Ethereum Name Service (ENS). With ENS, you can buy a unique name (for example, jamesbeck.eth) as an ERC-721 non-fungible token, then point it to an Ethereum address. ENS created human-readable Ethereum addresses, but it has since been used as a convenient way to airdrop NFTs, show your tokens or your NFT collection to others, and understand who votes for which proposals in DAO governance votes (the Decentralized Autonomous Organizations, those organizations run by code and by their members’ votes).

There’s an undeniable appeal to “getting” Web3, which may explain why some celebrities have displayed .eth usernames on X (formerly Twitter). Like the early internet protocols, there are no early investors in ENS, and the protocol itself is decentralized and based on open-source standards.

2026 update — Web3 identity has evolved. The self-sovereign identity services originally mentioned (IDX and Self.ID from 3Box Labs) are no longer the tools to recommend: 3Box Labs discontinued these products in favor of the Ceramic network. Today, the most widespread authentication building block is Sign-In with Ethereum (SIWE), which lets you log in to a service with your wallet rather than a password. In parallel, account abstraction (the ERC-4337 standard) and passkeys are gradually making wallets simpler: you can log in and sign without directly handling a seed phrase, which brings the Web3 experience closer to that of a regular app.

Like ENS, the broader vision is that people can sign up for new services and platforms by automatically choosing which data and information to share from their personal identity. For now, most initiatives around digital identities using blockchains are still anchored in the Web3 world, for example by linking your Ethereum address to your social profiles. However, Web3’s long-term goal is for real-world identities, such as a government-issued ID card, to also be integrated into the blockchain.

5. Web3: a reaction to Web2’s lack of security and data capture

Facebook (AKA ‘Meta’) owns a large part of your social graph data. Even if you leave the service, the data stays tied to Meta’s servers. Gavin Wood, who some credit with coining the contemporary term Web3, argued in 2014: “Web 3.0, or as might be termed the ‘post-Snowden’ web, is a re-imagining of the sorts of things that we already use the web for, but with a fundamentally different model for the interactions between parties. Information that we assume to be public, we publish. Information that we assume to be agreed, we place on a consensus ledger.”

In 2018, the Cambridge Analytica scandal drove the point home by revealing that the personal information of 87 million people had been harvested by a company trying to create psychographic profiles of voters in order to influence elections.

While that revelation made headlines, let’s be realistic: major data breaches happen all the time. It affects millions of internet users, simply because we trust companies to store our data, and we can’t revoke permissions when we switch to another service.

If you read the news about MetaMask wallets being impossible to open in certain countries, or my article about the JPMorgan VS MetaMask affair, I think you’ll easily grasp the value of being able to compartmentalize your identity and hold back certain data that is, in theory, useless to counterparties.

The design principle of Web3 applications is that individuals “push” information to trusted sources, instead of applications reaching out to third-party sources to obtain it. For example, in the Web2 world, when you “log in with Google”, an app can pull personally identifying data you never consented to.

The opacity of the data you share with the various apps on the web is actually one of the reasons social networks were able to build such a dominant position. This information is extremely valuable and, for the most part, you give it away the moment you sign a platform’s terms of use.

Web3 can be seen as a reaction to the imbalance between users and platforms on today’s internet — a relationship in which users will always get to choose what they want to share and what they want to keep private.

6. Web3 and creators: securing your intellectual property and controlling its distribution

It seems like everyone launched an NFT in 2021: at its peak, the market reached more than 23 billion dollars in total trading volume for the year according to DappRadar. For many digital artists, NFTs were, at that moment, the first way to support their art full-time. And because NFTs are a versatile token format, you can mint an NFT by deploying your own code or by using a marketplace.

2026 update — the NFT market correction. That 23 billion figure corresponds to the 2021 euphoria: it doesn’t reflect today’s market. Since then, the bubble has largely deflated. According to DappRadar’s reports, 2024 NFT volume (~$13.7 billion) marked the worst year since 2020, and activity kept falling in 2025 (quarterly volume dropping back below one billion dollars, the number of active traders down more than 90% from the peak). The “art” segment in particular collapsed by more than 90% compared to 2021. The takeaway: NFTs remain an interesting technical innovation (proof of ownership, royalties, ticketing, identity), but as a speculative asset they went through a classic cycle of euphoria followed by capitulation. To understand this repeating pattern, read our guide to understanding the cycles of euphoria and capitulation that have driven Web3 since 2021. And don’t forget that this period also saw the collapse of Terra/LUNA and then FTX in 2022, as well as the arrival of a real regulatory framework in Europe with MiCA (applicable in 2024-2025).

Unlike Web2 social networks, your token can be bought on one service, sold on a secondary market or used for other games and applications. In other words, by inheriting Ethereum’s properties, NFTs are liquid representations of value because they’re interoperable.

Some of the first NFT marketplaces quickly understood that their role isn’t simply to act as a marketplace. It was also essential to build genuine consensus between creators, users and the platform itself.

In 2021, SuperRare launched a $RARE governance token and created the SuperRare DAO to reward its early artists and collectors, as well as to encourage the community to take part in curating its art, explaining:

“We envision Spaces as the future of community-driven art curation: a dynamic ecosystem of curators, artist collectives, galleries and community members who welcome artists and collaborate on auctions, under SuperRare’s shared brand and technology.”

Other ETH applications now use tokens as a way to reward contributions to the network and help manage decisions. Even Web2 social networks like Reddit are testing the use of tokens known as “community points” so that active subreddit contributors can “own” part of the social network. DeFi protocols like Uniswap have already created positive-sum dynamics by incentivizing liquidity providers to supply capital for trading pairs of nearly every asset on Ethereum.

The benefits of individuals having a collective stake in the many services they use on the web could be the biggest threat yet to the network effects of the dominant social platforms.

Scott Belsky poses the following question: “If every stakeholder in these companies were strongly incentivized to help build, improve, market and frequent the brands, would that become a competitive advantage over the big corporations?”

7. Web3: a new model of patronage and direct support for creators

The increasingly vague term “creator economy” is used to describe a very concrete reality: more and more people make a living directly from what they produce online, without a middleman. The problem, in the Web2 world, is that this middleman is everywhere. Between a creator and their audience there’s always a platform, its algorithm and its commission slipping in. You own neither your audience nor the relationship you have with it: overnight, a unilateral decision can cut off your income.

Web3 offers another, more direct model of patronage. Rather than indirectly monetizing an audience through a platform’s advertising, the creator can sell directly to their community a digital item (NFT), access, or a share of governance in their project. Royalties programmed into the smart contract even make it possible, in theory, to earn a percentage on every resale on the secondary market — something impossible in the traditional art world, where the artist never sees a cent from the resale of their works.

We find here the same logic as the patronage of old, but at internet scale: direct, transparent and traceable support, where every contributor knows exactly what they’re funding and what they get in return. It’s a paradigm shift: you no longer passively “consume” a creator’s work, you become a stakeholder in it.

8. Web3 and governance: DAOs and community structures

If ownership is distributed among users, there still needs to be a way to make collective decisions. That’s the role of DAOs (Decentralized Autonomous Organizations). A DAO is an organization whose rules are written into code (smart contracts) and whose decisions are made by the vote of its members, generally in proportion to the governance tokens they hold.

Concretely, where a traditional company has a board of directors and a hierarchy, a DAO operates through proposals and open votes recorded on the blockchain. Anyone can check who voted for what, and the code automatically executes the approved decision. We’ve seen DAOs manage multi-billion-dollar DeFi protocols (like the Uniswap or MakerDAO treasury), fund projects, or even attempt to collectively buy iconic items.

This model isn’t a flawless utopia: voter turnout is often low, power can concentrate in the hands of the largest token holders (the famous “whales”), and the legal framework remains murky in many countries. But the underlying idea is powerful: letting a community coordinate resources and govern a digital commons, without trusting a single central authority. It’s exactly the kind of cooperative structure that Web2 didn’t allow.

9. Web3 isn’t (yet) perfectly decentralized

Let’s be honest to close out: Web3 is a promise under construction, not an accomplished fact. Behind the decentralization talk, the reality is more nuanced.

The points of centralization that remain

Many dApps still rely on centralized infrastructure: node providers like Infura or Alchemy, front-ends hosted on conventional servers, or stablecoins issued by private companies. A large share of crypto trading still goes through centralized platforms. And MetaMask itself, the gateway to Web3, is published by a company. When a third-party service goes down, part of the “decentralized” Web3 can become inaccessible.

Add to that token concentration (a handful of players often hold a huge share of a project’s supply), the influence of large venture capital funds in financing protocols, and reliance on a few dominant blockchains: we’re still far from a fully distributed, censorship-resistant internet.

Why it still matters

That said, the goal isn’t binary. Decentralization is a slider, not a switch. Every genuinely decentralized building block — an open-source protocol, an asset you hold in self-custody, an identity you control — makes the whole a little more robust and a little less dependent on a single player. Web3 won’t replace Web2 overnight: it layers on top of it, fills its blind spots (ownership, value transfer, identity) and advances through iterations, euphoria cycles and corrections included.

As a beginner, remember this above all: don’t confuse the technology (solid and durable) with the speculation (cyclical and risky). Understanding Web3 means first understanding what you truly own and who controls what.

FAQ: your questions about Web3

What is Web3 in one sentence?

Web3 is a new version of the internet built on the blockchain, where users genuinely own their data, their identity and their digital assets, without depending on a central platform. In short: Web1 is read, Web2 is written and read, Web3 is owned, written and read.

Do you need to buy NFTs to use Web3?

No. NFTs are just one use of the blockchain among many. After the 2021 euphoria, the NFT market corrected sharply: don’t approach them as a guaranteed investment, but as a technological building block (proof of ownership, ticketing, identity). The heart of Web3 is really the self-custody of your crypto and control over your identity.

How do you actually get started with Web3?

Three simple steps: (1) buy your first crypto on a regulated platform like OKX; (2) create your own MetaMask wallet and carefully back up your seed phrase; (3) transfer a small amount to your wallet to get familiar with on-chain transactions. Start small, understand before you invest.

Are Web3 and crypto the same thing?

Not exactly. Cryptocurrencies are the economic fuel of Web3 (they enable payments, governance, rewards), but Web3 is a broader concept that also encompasses decentralized storage, self-sovereign identity, DAOs and decentralized applications.