Google Cloud Storage (GCS) is a scalable, secure, and durable object storage service provided by Google Cloud Platform. It allows users to store and retrieve any amount of data at any time from anywhere on the web. GCS is commonly used for hosting static website content, storing backups, archiving data, and serving large datasets for analytics or machine learning. It offers features such as data encryption, access control, lifecycle management, and integration with other Google Cloud services. GCS supports multiple storage classes to optimize costs based on data access frequency and retention needs. Its global infrastructure ensures high availability and low latency for users worldwide.