# 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="https://3495787697-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F3iD8qFVyjPp1N1FbL3AL%2Fuploads%2FOF7JcnjM4NLk0X9HyQ1o%2FBlockchain.webp?alt=media&#x26;token=5e8e52fe-cd2b-471e-9229-f022c30ebbe8" 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.