About AWS

AWS is one of the three dominant public cloud computing providers.
“cloud computing” can refer to one of three types of cloud: “public,” “private,” and “hybrid.” AWS is a public cloud provider, since anyone can use it. Private clouds are within a single (usually large) organization. Many companies use a hybrid of private and public clouds.
The core features of AWS are infrastructure-as-a-service (IaaS) — that is, virtual machines and supporting infrastructure. Other cloud service models include platform-as-a-service (PaaS), which typically are more fully managed services that deploy customers’ applications, or software-as-a-service (SaaS), which are cloud-based applications. AWS does offer a few products that fit into these other models, too.
In business terms, with infrastructure-as-a-service you have a variable cost model — it is OpEx, not CapEx (though some pre-purchased contracts are still CapEx).

Why Cloud Computing using AWS?

If your company is building systems or products that may need to scale
and you have technical know-how
and you want the most flexible tools
and you’re not significantly tied into different infrastructure already
and you don’t have internal, regulatory, or compliance reasons you can’t use a public cloud-based solution
and you’re not on a Microsoft-first tech stack (debatable)
and you don’t have a specific reason to use Google Cloud
and you can afford, manage, or negotiate its somewhat higher costs