Non-fungible token (NFT) is a fixed data unit stored in a blockchain, a type of digital ledger, that can be sold and sold. Types of NFT data units may be associated with digital files such as photos, videos, and audio. Because each token looks different, NFTs differ in many crypto currencies, such as Bitcoin, which can be frustrating.

NFT agents claim to provide a public certificate of authenticity or proof of ownership, but the legal rights granted to NFT may be uncertain. NFTs do not restrict the sharing or copying of digital digital files, do not actually transfer copyright to digital files, and do not prevent the creation of NFTs with similar related files.

NFTs have been used as speculative assets, and have received increasing criticism for energy costs and the carbon footprint associated with ensuring blockchain sales and their frequent use of technology scams. The NFT market has also been compared to the Ponzi scheme. 

Digital art is very common within NFTs. Most of them provide benefits, as an example 15% off specific products on a website.

It's also very common amongst games. Owning an NFT could provide in-game assets, like items, summons, houses, plots and so forth...

This is just a short and simple explaination of what NFTs are, if you're interested in more i'd recommend reading about it on here. https://www.investopedia.com/non-fungible-tokens-nft-5115211

and

https://ethereum.org/en/nft/