Cloud conversation is pretty much about deployment. Existing infrastructures relying on traditional VPS are being moving to IaaS, while new software are moving to PaaS. So, from one perspective, cloud isn't really a new initiative but a new approach to existing problems.
Deploying a web application (and, consequently, a web API) should be a straightforward process either to reduce friction between the development process (dev/test cycles), or to be "agile", letting teams deploy and continuously minimizing the administrative effort.
This figure highlights that the deployment phase in every process can occur multiple times and must be easy to achieve:
So, our focus is on two main things: