FaaS
In plain terms
Cloud model where you run individual functions on demand.
Going deeper
Functions-as-a-Service runs small pieces of code triggered by events, scaling automatically and billing per execution, with no server management. It's the granular form of serverless.
Under the hood
Stateless functions with cold-start latency and time limits; event-driven and tightly scoped.
Examples
AWS Lambda, Azure Functions, Cloud Functions, event handlers.
Think of it like...
Like hiring a specialist for a single task who vanishes when it's done.