The mempool, short for “memory pool,” is a key component of the blockchain transaction processing system. It’s where transactions are stored after being broadcast to the network and before being confirmed in a block. Understanding how the mempool works is important for anyone interested in blockchain technology, as it can impact transaction fees, confirmation times, and overall network performance. In this article, we’ll provide an introduction to mempools in blockchain, explaining how they function, what factors can affect transaction processing, and how miners choose which transactions to include in their blocks. We’ll also touch on some common mempool-related issues and explore potential solutions. By the end of this article, readers will better understand the role mempools play in blockchain and how they can impact transactions on the network.