What is an Event-Driven Automation?

The alternative to event-driven automation is polling or manual kick-off: a script that checks every five minutes whether anything changed, or a person who has to remember to run a report. Event-driven systems instead react the instant a meaningful change happens, which cuts latency and wasted compute, and scales naturally because idle periods cost nothing. The architecture usually involves an event source, a routing layer (an event bus, webhook receiver, or queue), and one or more handlers that execute the actual automation logic. Designing it well means being precise about what counts as "the event" (a raw database write versus a validated business event, for instance), handling duplicate or out-of-order events gracefully, and making handlers idempotent so a retried event doesn't cause a double charge or a duplicate notification. Event-driven automation is what makes real-time-feeling systems possible — a customer support ticket routed the second it's created, a payment reconciled the moment it clears — without constant polling overhead.