> For the complete documentation index, see [llms.txt](https://docs.spydra.app/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.spydra.app/getting-started/blockchain-fundamentals.md).

# Blockchain fundamentals

- [Why Blockchain?](https://docs.spydra.app/getting-started/blockchain-fundamentals/why-blockchain.md)
- [Private Blockchain](https://docs.spydra.app/getting-started/blockchain-fundamentals/private-blockchain.md)
- [Public Chain](https://docs.spydra.app/getting-started/blockchain-fundamentals/public-chain.md)