A Keeper may have many of these. We recommend using as many of these as you prefer. Some Keepers may use a couple, others may use dozens. Using multiple KTAs makes your trading operation queue simultaneous trades more easily since you don't need to queue future nonces. Example: KTA1 for trade1 and KTA2 for trade2, as opposed to KTA1-nonce-1 for trade1 and KTA1-nonce-2 for trade 2.