In the previous article, we learned how blockchain records and verifies transactions.
Now the next step is understanding something called a block.
The word blockchain actually comes from two simple words: block and chain.
Transactions are stored inside blocks, and these blocks are connected together to form a chain.
This structure is what creates the blockchain.
A block is basically a container that stores a group of transactions.
Instead of adding each transaction to the blockchain one by one, the network collects many transactions and places them together inside a block.
Once the block is verified, it is added to the chain of previous blocks.
From that point on, the information becomes part of the permanent record of the blockchain.
Here are the key things that make up a block.
1️⃣ A list of transactions
Each block contains multiple transactions that happened within a certain period of time.
2️⃣ A reference to the previous block
Every block includes information that connects it to the block that came before it.
3️⃣ A timestamp
The block records the time when the transactions were confirmed and added to the network.
4️⃣ A unique digital fingerprint
Each block contains a special code that helps protect the integrity of the data.
A simple example can help explain this idea.
Imagine a notebook where you record payments between people.
Instead of writing every payment on a new page, you fill an entire page with many transactions.
Once the page is full, you seal it and start writing on the next page.
Each page also includes a reference to the previous one so the entire notebook stays in order.
In this example, each page is similar to a block.
Blocks matter because they organize transactions and make the blockchain easier to maintain.
They also help ensure that the transaction history remains secure and connected.
This system is what allows blockchain networks to store large amounts of data while keeping everything in the correct order.
📌 In the next article, we’ll explore:
What a hash is and why it plays a critical role in securing the blockchain.
If you’re just starting to learn about crypto, follow the Crypto 101 series as we build the foundation step by step. 🚀
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