What is Function as a Service / FaaS?
Calling Functions from a Cloud Service
Function as a service is when you just want to input some arguments, perform some action, and get a resulting value but you don’t want to do all the work to host the infrastructure, platform to do so and you don’t want to just use someone else’s software — just like when creating functions when programming except you do it over the Internet on a service that hosts your functions and runs them when you call them on demand. Amazon calls this their Lambda service. Others call this “actions.”