Serverless

Serverless does not mean there are no servers. It means the cloud provider hides most of the server management from you.

With functions and managed workflow services, you deploy code or configuration and the platform deals with runtime hosts, scaling, and some patching. You usually pay per execution, runtime, or resource consumption rather than for a VM that sits there all month.

It works well for event-driven jobs, glue code, scheduled automation, and bursty workloads. It works less well when you need long-running processes, deep control over the runtime, or predictable low-latency startup every time.