> For the complete documentation index, see [llms.txt](https://bitroot.gitbook.io/bitroot/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://bitroot.gitbook.io/bitroot/bitroot-beginners-guide/what-is-blockchain.md).

# What is Blockchain?

Blockchain is a type of distributed ledger technology. It records data in units called “blocks,” which are linked together in a chain structure to form a secure, tamper-proof, and transparent database. Key features of blockchain include:<br>

* **Distributed Storage:** Every node in the blockchain network holds a complete copy of the data, eliminating the risk of a single point of failure.
* **Decentralization:** There is no central authority managing the data; instead, all participants jointly maintain the network’s security and integrity.
* **Immutability:** Each block contains the cryptographic hash of the previous block, making it easy to detect any unauthorized changes to past data.
* **Transparency:** All transactions on the blockchain are open to participants, fostering trust and accountability.<br>

Thanks to these features, blockchain has found wide-ranging applications in finance, logistics, healthcare, supply chain management, and more.

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