When you send a crypto transaction, it doesn’t instantly appear in a block.
Instead, it first goes into a mempool (short for “memory pool”).

Think of the mempool as the waiting room for transactions — a temporary holding area where they wait until a validator or miner picks them up.

Step-by-Step: Life of a Transaction

1. You Send It
   – Your wallet signs the transaction and broadcasts it to the network.
2. It Arrives in the Mempool
   – The transaction sits here, along with thousands of others.
3. Validators/Miners Pick It
   – When creating the next block, they choose transactions from the mempool — usually the ones with higher fees first.
4. It Gets Confirmed
   – Once in a block, the transaction leaves the mempool forever.

Why Mempools Exist

Blockchains can only process a limited number of transactions per block.
If more people are sending transactions than the network can handle at once, the extras must wait their turn — in the mempool.

The Fee Factor

• High fee = VIP pass
  If you pay more gas/fees, miners/validators are more likely to pick your transaction first.
• Low fee = Regular ticket
  You might wait longer, especially during high network congestion.

Real-World Analogy

Imagine an airport security line:

• Mempool = The queue before the scanners.
• Transaction fee = Priority boarding pass — lets you skip ahead.
• Block = The plane taking off with confirmed passengers (transactions).

When Mempools Get Crowded

If a blockchain is busy (like Ethereum during NFT mints or meme coin frenzies), the mempool can overflow with pending transactions.
This can lead to:

• Long delays for low-fee transactions
• Higher average gas fees
• Sometimes, older low-fee transactions getting dropped entirely

Conclusion

The mempool is the waiting room of the blockchain — where transactions line up before being locked into the permanent record.
Understanding it helps you know why your transfer is instant sometimes… and painfully slow other times.

For More Info related to Mitosis please follow official links below

Mitosis Website : https://mitosis.org/

Mitosis Expedition : https://expedition.mitosis.org/

Mitosis Docs : https://docs.mitosis.org