Amazon Web Services (AWS) is a comprehensive, evolving cloud computing platform provided by Amazon. It offers a mix of infrastructure as a service (IaaS), platform as a service (PaaS) and packaged software as a service (SaaS) offerings.
In AWS Amazon Certifications world rules are quite simple, you require to know how to work with the system, or you will not be working at all. To determine how to work with the system, you have a broad understanding at your disposal, and it is up to you implement it. The best way to demonstrate that you know how to work efficiently with Amazon Web Services is to have one of the AWS Amazon Certifications.