An introduction to Amazon EventBridge

• Serverless event bus that decouples event producers from event consumers (pub/sub model).
• Automates actions in response to events happening across your AWS environment:
  • Schedule cron-style jobs (ex. trigger a Lambda function every hour).
  • React to state changes (ex. send an SNS email notification when a specific IAM user signs in, via CloudTrail).
• Events can be aggregated across AWS accounts, regions, and your AWS Organization — using event buses and resource-based policies for cross-account delivery.
• Successor to CloudWatch Events, with broader routing (SaaS partners, custom apps) via rules and event patterns matched against a bus.

More reading:

• https://docs.aws.amazon.com/eventbridge/latest/userguide/eb-what-is.html