GCP Cloud Storage is a scalable and secure object storage solution provided by Google Cloud. In a streaming ETL (Extract, Transform, Load) workflow, it serves as a versatile storage option for raw, intermediate, or transformed data. Its seamless integration with other Google Cloud services makes it a core component for handling real-time and batch data pipelines.

• Raw Data Ingestion: Stream and store raw data from various sources, such as IoT devices or logs, for downstream processing.
• Intermediate Data Staging: Use Cloud Storage as a temporary storage layer for ETL workflows to manage data between extraction and transformation.
• Data Lake Creation: Store transformed data in Cloud Storage to build a centralized data lake for analytics and machine learning.
• Archiving and Compliance: Leverage Cloud Storage for long-term archival of critical data with lifecycle management for cost optimization.