> For the complete documentation index, see [llms.txt](https://zkrace.gitbook.io/whitepaper/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://zkrace.gitbook.io/whitepaper/technical-summary/nft-tokens.md).

# NFT Tokens

A **non-fungible token is a unit of data stored on a blockchain**, that certifies a digital asset to be unique and therefore not interchangeable. It means that NFTs are unique. They **cannot be duplicated or replaced** - only one token can exist. Ethereum allows users to easily store, create and send NFT tokens, therefore the **Ethereum network** is the market leader.

NFTs can be used to represent items such as photos, videos, audio, and other types of digital files. NFTs are frequently used to sell a wide range of virtual collectibles, including NBA virtual trading cards, music, digital images, video clips, and even virtual real estate in a virtual world.\
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In this case, **NFT technology allows us to create and store unique horses as NFT tokens**. Each horse is different and has its own unique characteristics.