How does a Mempool work?
On networks such as Ethereum, nodes validate incoming transactions and may relay them to peers. Builders or block producers use available transactions when constructing a block.
What should trading bot developers know about Mempool?
Not all order flow is publicly visible, and not all chains expose an Ethereum-style public mempool. Solana's forwarding and leader pipeline should not be explained as the same global pending-transaction model.
Sources & further reading
Definitions are editorial summaries of the sources below. Protocol behavior and provider policies can change; consult the linked documentation for implementation details.