S3 refers to Simple Storage Service. It is an object storage service provided by Amazon Web Services (AWS) that is highly scalable and durable. S3 enables users to store and access any volume of data from any location on the internet. This service is frequently utilized for hosting websites, backing up data, and archival purposes. Data is organized as objects within buckets, which function like storage containers. S3 provides multiple storage classes to help manage costs according to how often the data is accessed.