Function as a service (FaaS) is a category of cloud computing services that provides a platform allowing customers to develop, run, and manage application functionalities without the complexity of building and maintaining the infrastructure typically associated with developing and launching an app.

Serverless architectures refer to applications that significantly depend on third-party services (known as Backend as a Service or “BaaS”) or on custom code that’s run in ephemeral containers (Function as a Service or “FaaS”). This simply means the application developer does not need to worry about provisioning servers and scaling them but simply relies on infrastructure and services already built for all of that

functions-as-a-service (FaaS)