# How and Action becomes a Transactions - tl;dr

## Overview
This is a biggie. Today we will look at how an action becomes a transaction
- what is proof of stake
- what is a shard
- what is a block
- what is a validator
- what is a chunk
- validator / shard relationship
- 4 shards atm
- 25 validators per shard
- journey of a transaction from contract method to receipt on explorer

## What Does This Mean?

## How Does This Work?

## Specific Section Title

## Conclusions

###### tags: `tldr` `content`