Block

A block is a digital package of transactions on a blockchain. After verification, it’s added to the existing chain of blocks.

What is a block?

A block is part of a blockchain that stores transactions and other data. You can think of a block as a page in a digital ledger. This page might contain several crypto transactions and information about when the block was created.

Each new block is linked to the previous block. This creates a chain of blocks, or a blockchain. Because the blocks are connected, it’s very difficult to change data that has already been stored.

Before a block is added to the blockchain, the network checks whether the transactions are valid. The new block is then added to the blockchain so the computers in the network can update their records.

An example of a block

Suppose you send Bitcoin to someone. Your transaction is collected along with other transactions. The network checks whether the transactions are valid, such as whether you have enough Bitcoin to cover the amount.

The transactions are then included in a new block. Once this block is added to the blockchain, your payment is recorded in the public digital ledger. This lets anyone check that the transaction took place.

Why are blocks important in crypto?

Blocks are important because they make it possible to record transactions on a blockchain. This allows cryptocurrencies such as Bitcoin and Ether to work without a bank having to process every transaction. The computers in the network check the data and keep the blockchain up to date.

You’ll often read about blocks in crypto news. This might include how quickly new blocks are added, how many transactions fit in a block, or changes to block size. These factors can affect how quickly and cheaply people can send crypto.

You’ll also come across terms such as miners and validators. Depending on the blockchain, they help verify transactions and add new blocks. Blocks help ensure that transactions are recorded in an organized and verifiable way.