A workload is the thing you hand to Marshal and the thing you pay for. It is not a feature, a seat, or a fraction of someone's day. Inbound lead handling is a workload: every inbound lead answered, enriched, routed, followed up until it books or dies, logged, and reported. All of it, every time, with nothing left over for a person to remember.
We call it a job because that is how you already think about it. When work grows past what your team can carry, you write a job posting: a bundle of duties one hire will own. A Marshal workload is that bundle. Pick the job, get the agent.
A workload is made of workflows. The big workflows do the visible work; the small ones (the pipeline report, the CRM hygiene, the logging) come included, because a stream of work is only owned if the annoying parts are owned too.
One agent runs one workload.