Amazon Web Services is a cloud computing platform provided by Amazon. The AWS offers all three service models such as Software as a Service (SaaS), Infrastructure as a Service (IAAS), and Platform as a Service (PaaS).
There are more services which comprise the Amazon Web Services including Amazon Elastic Compute Cloud (EC2) which provides virtual servers, Amazon Simple Storage Service (S3) which provides scalable storage for backups, analytics.
Then there are other services such as Amazon relational database management system, DynamoDB, AWS Migration hub, and more.
AWS provides services in almost every category from mobile development to data analytics.