What Is Blockchain? How Decentralized Ledgers Really Work!

Blockchain is a distributed digital ledger where every block of data links to its predecessor via cryptographic hashes—creating an immutable, transparent chain that resists tampering .

🔍 **In this video you’ll learn:**

1. How transactions are bundled into blocks, hashed, and chained together .

2. How consensus mechanisms (e.g., Proof‑of‑Work, Proof‑of‑Stake) ensure all nodes validate and agree on new blocks .

3. Why it works with security, transparency, immutability, and decentralization—no central authority needed .

4. Real‑world uses: cryptocurrencies (Bitcoin, Ethereum), smart contracts, supply chain tracking, finance & more .

We also discuss blockchain types: public, private, hybrid, and consortium systems , and weigh pros (transparency, security) against cons (energy use, scalability, regulation) .

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