◽Introduction

The mempool, also known as the memory pool, is a collection of all transactions that have not yet been confirmed and added to a block on the blockchain. Transactions are temporarily stored in the mempool of each node on the network, until they are verified and added to a new block. The concept of mempool is both used in Ethereum and Bitcoin blockchains. We’ll focus on the Ethereum mempool, which often holds thousands of pending transactions at any given time.