# Introduction

A block in a blockchain is a group or collection of information. The information is added to the block in a blockchain, by connecting it with other blocks in the chronological order and creating a chain of blocks linked together. Let’s take the example of Google spreadsheet or MS Excel (Windows). This spreadsheet is shared among different computer networks, where everyone has a copy. The spreadsheet contains data and information of transactions made by individuals. Anyone with a copy can access that spreadsheet but no one can edit or change it. This is how the blockchain works. It uses blocks, whereas spreadsheet works with “rows” and “columns”.

<figure><img src="/files/G3hLxn4MaJK1cnAOmOWA" alt=""><figcaption></figcaption></figure>

The blockchain is a *distributed ledger.* This means that a ledger is spread across the network between all peers in the network, and each peer holds a copy of the complete ledger. Some key properties that make blockchain far superior and better than the traditional system of information ledgering.


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