Trading fees: A small percentage of the trade paid by traders to pool LPs, set by the pool creator or dynamically optimized by Gauntlet. Additionally, Balancer governance can vote to introduce a Protocol Trading Fee, which is a percentage of the Trading Fee.
For instance, if a pool had a 1% fee, and governance introduced a 1% protocol fee - the total swap fee to the trader would remain at 1%, but now 0.99% would accrue to the pool's LPs, and 0.01% would accrue to the protocol fee collector contract.