> For the complete documentation index, see [llms.txt](https://docs.luxy.io/help-center/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.luxy.io/help-center/luxy-marketplace/key-concepts.md).

# Key Concepts

## Key concepts

If you aren't used to NFT concepts, check out these guides:

[What is an NFT?](/help-center/luxy-marketplace/key-concepts/what-is-a-nft.md)

[Collections](/help-center/luxy-marketplace/key-concepts/collections.md)

[Royalties](/help-center/luxy-marketplace/key-concepts/royalties.md)

[Gas price](/help-center/luxy-marketplace/key-concepts/gas-and-fees.md)