Why do you use Step Functions?

AWS Step Functions is a serverless orchestration service that lets you coordinate multiple AWS services into serverless workflows so you can build and update apps quickly. A Step Functions state machine is defined in Amazon States Language (JSON) and can include Task, Choice, Parallel, Wait, and Pass states. The key benefits are: 1) visual workflow and state diagram for easier debugging; 2) built‑in error handling, retries, and timeouts; 3) automatic state persistence and fault tolerance; 4) tight integration with Lambda, ECS, Batch, SageMaker, and many other services; 5) no need to manage infrastructure or write custom orchestrator code. For example, an e‑commerce order processing pipeline can use Step Functions to invoke a Lambda that validates the order, a Batch job that updates inventory, and a notification service, with retries on failure and a final success state. This reduces operational overhead, improves reliability, and gives clear audit trails.