An event describes a change
Events allow systems to react to changes without making every participant wait for the whole workflow to finish. Each consumer should have a clear responsibility.
Failure is part of the design
Delayed or repeated messages need a deliberate response. Decide how failed work is identified, investigated, and retried without hiding it from the team operating the system.
Keep the business meaning visible
Technical delivery is only part of the story. A marketplace still needs to understand which transaction changed, why it changed, and whether further action is required.
Explore the underlying concepts.
For more technical context, read AWS: Event-driven architecture best practices ↗. This link is a reference, not a statement of partnership or integration. This introduction is not a complete implementation guide or advice about regulated financial services.