You said:

Block chain

ChatGPT said:

⛓️ What Is Blockchain?
Blockchain is a digital system for recording information in a way that makes it secure, transparent, and hard to change.
Think of it like a shared digital notebook:

• Everyone can see it.
• Once something is written, it can’t easily be erased.
• No single person controls it.

🔹 How It Works (Simple Explanation)

1. Transaction happens
2. Example: You send cryptocurrency to someone.
3. Transaction is grouped into a “block