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What is Non-Fungible Token (NFT)?

Blockchain & Web3, explained by the engineers who build it. Definition, how it works, use cases and common questions.

NFT definition

A non-fungible token (NFT) is a unique digital token on a blockchain that represents ownership of a specific item, such as digital art, a collectible, a game asset, an event ticket or a membership. Unlike cryptocurrencies, where every unit is interchangeable, each NFT has a distinct identifier, and its ownership history is publicly recorded.

How do NFTs work?

An NFT is created, or minted, by a smart contract that follows a standard such as ERC-721 or ERC-1155 on Ethereum-compatible chains, or a similar standard on chains like Solana. The contract assigns each token a unique ID and records which wallet owns it. The token usually points to metadata, a file describing the item's name, attributes and media, which is often stored off-chain on IPFS, Arweave or ordinary web servers.

Transfers happen through blockchain transactions, so marketplaces and wallets can display ownership and history consistently. Smart contracts can also encode rules, such as limits on supply or royalty information for creators, though royalty enforcement depends on marketplaces honoring it. Ownership records are public, so anyone can verify them.

NFT use cases beyond digital art

NFTs became widely known through digital art and profile picture collections, but the underlying idea, a verifiable and transferable record of a unique item, applies to many other areas. The most durable use cases tend to give the token a practical function rather than relying on speculation, as in the examples below.

  • Event tickets that reduce fraud and enable controlled resale.
  • In-game items players can own and trade.
  • Memberships and loyalty passes granting access or benefits.
  • Certificates, credentials and proofs of attendance.
  • Digital twins and authenticity records for luxury goods.
  • Domain names, such as Ethereum Name Service names.

What does owning an NFT actually mean?

Owning an NFT means controlling a token on a blockchain that points to an item. It does not automatically grant copyright or commercial rights to the underlying artwork or content; those depend on the license the creator attaches. If metadata or media are hosted on a server that goes offline, the token may point to nothing. Buyers should check the license terms, where the media is stored and whether the collection's contract has admin controls that can change it.

Risks of NFTs

NFT markets have been highly speculative, with prices for many collections falling sharply after peaks. Common risks include wash trading that inflates apparent value, counterfeit collections copying popular art, phishing sites that trick users into signing malicious approvals, and smart contract bugs. Legal questions around intellectual property, consumer protection and taxation vary by country. For businesses, the biggest risk is launching an NFT project without a clear purpose that customers value.

NFTs for businesses

Businesses use NFTs where verifiable ownership and transferability add value, such as ticketing, loyalty, product authenticity and digital collectibles linked to physical goods. Good implementations hide crypto complexity with embedded wallets, card payments and gas sponsorship. Nexzem builds NFT marketplaces and token-based loyalty and ticketing systems, focusing on utility and user experience rather than speculation.

Measure success by the same metrics as any product, such as repeat purchases, ticket fraud reduction or loyalty engagement, rather than by secondary market prices. If the token adds nothing customers can feel, a conventional database will serve them better and cost less to run.

NFT: common questions

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What is the difference between an NFT and cryptocurrency?

Cryptocurrencies such as Bitcoin or ETH are fungible: every unit is interchangeable with another of the same value. NFTs are non-fungible: each token has a unique ID and represents a specific item, so one NFT is not equivalent to another. Both use blockchains to record ownership and transfers.

What is the difference between ERC-721 and ERC-1155?

ERC-721 is the original Ethereum standard for NFTs, where each token is unique and managed individually. ERC-1155 is a multi-token standard that can handle both unique and fungible tokens in one contract, with efficient batch transfers. Games and ticketing systems often prefer ERC-1155 because they manage many similar items.

Are NFTs still used?

Yes, though the focus has shifted from speculative art collections toward practical uses such as ticketing, loyalty programs, gaming items, credentials, domain names and tokenized real-world assets. Many projects now hide the NFT technology behind familiar user experiences, so users may not even realize a token records their ownership.

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