Blockchain

A blockchain is a distributed digital ledger that records transactions across many computers in a way that makes it nearly impossible to change or hack.

Simple Explanation

Think of a blockchain like a digital notebook that everyone can see and verify, but no one can erase or change past entries. Each page in this notebook is a "block," and all the pages are chained together in order.

Key Features

• Decentralized: No single person or organization controls it
• Transparent: Everyone can see all transactions
• Immutable: Once recorded, data cannot be changed
• Secure: Protected by cryptography

Example

When you send Bitcoin to someone, that transaction is recorded in a block. Once the block is added to the chain, everyone can verify it happened, but no one can change or delete it.