This document discusses AWS Step Functions and how it can be used to orchestrate serverless applications and functions. It provides examples of how Step Functions allows developers to sequence functions, select functions based on data, retry functions, implement try/catch/finally blocks, run functions in parallel, and coordinate long-running code. It also discusses how Step Functions is scalable, maintains state, handles errors/timeouts, is easy to build and operate, and provides auditable workflows. The document contains examples of JSON state machine definitions and demonstrates how Step Functions integrates with other AWS services.