Key value of AWS: Pay for what you need
What is a client-server model?
In computing, a client can be a web browser or desktop application that a person interacts with to make requests to computer servers. A server can be services, such as an EC2 instance - a type of virtual server.
What is Cloud Computing?
Cloud computing is the on-demand delivery of IT resources and applications through the internet with pay-as-you-go pricing.