Amazon Simple

Cloud storage is a service model in which data is transmitted and stored on remote storage systems, where it is maintained, managed, backed up and made available to users over a network (typically the internet). [Source: TechTarget]

Service (Amazon S3) is an

Object storage, also called object-based storage, is an approach to addressing and manipulating data storage as discrete units, called objects. Objects are kept inside a single repository, and are not nested as files inside a folder inside other folders. [Source: TechTarget]

service that offers industry-leading scalability, data availability, security, and performance.