ELI5: blockchain

high confidence

March 26, 2026

// explanation

// eli5Imagine a notebook that records who gave what to whom, but instead of one person keeping the notebook, many friends each have an identical copy [3][5]. When someone wants to add a new page, everyone checks that it's correct before adding it. Once it's written, no one can erase or change it - it's permanent [2][3]. This notebook is a blockchain, and it helps people trust each other without needing a teacher or parent to watch over them [5].

// sources

[1]Blockchain: Invest like an icon

We power crypto access for everyone: from private people, to pros, to public companies. Here since the beginning of crypto.

[2]What Is Blockchain? | IBM

Blockchain is a shared, immutable digital ledger, enabling the recording of transactions and the tracking of assets within a business network.

[3]Blockchain - Wikipedia

A blockchain is a distributed ledger with growing lists of records (blocks) that are securely linked together via cryptographic hashes. ... Each block contains a ...

[4]Blockchain Wallet: Buy BTC - Apps on Google Play

Here since the beginning of blockchain. Buy Bitcoin (BTC), Ethereum (ETH), SOL and thousands of cryptocurrencies in a secure crypto wallet trusted by millions.

[5]Blockchain Facts: What Is It, How It Works, and How It Can Be Used

Blockchain is a decentralized digital database or ledger that securely stores records across a network of computers in a way that is transparent, immutable, and ...

[6]How does a blockchain work - Simply Explainedvideo

Video by Simply Explained

[7]Blockchain In 7 Minutes | What Is Blockchain | Blockchain Explained|How Blockchain Works|Simplilearnvideo

Video by Simplilearn

[8]All about Blockchain | Simply Explainedvideo

Video by Apna College

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