Most finance automation runs on a timer. The payout completed this morning, but matching starts tonight. The order came in before lunch, but the checks run tomorrow. In between, the books are quietly out of date, and anything that went wrong sits unnoticed until the next scheduled pass picks it up.
Webhooks remove the waiting. When something happens in your systems (a new order, a completed payout, an updated record) the event triggers Nance directly and the work starts then and there. It runs the other way too: when Nance finishes something (a booking made, an approval given) it notifies the systems that need to know. Every event is signed and verified before anything runs, and every triggered workflow is logged from event to outcome. Real-time, but still under your rules.