Amazon SQS (Simple Queue Service) is a fully managed message queuing service that enables decoupled communication between distributed systems. In a streaming ETL (Extract, Transform, Load) workflow, SQS serves as a reliable intermediary to handle data ingestion and transfer between various components. By ensuring message durability and delivery, SQS simplifies real-time data processing in ETL pipelines.

• Data Buffering: Queue streaming data from multiple sources to manage processing loads and ensure smooth pipeline operation.
• Decoupled Workflows: Enable independent scaling and processing of ETL components by decoupling data producers and consumers.
• Error Handling and Retry: Use dead-letter queues to capture failed messages for troubleshooting and reprocessing.
• Trigger-Based Processing: Automatically trigger ETL processes when new messages are added to the queue.