Serverless

Serverless is a cloud execution model: run code in response to events, with the provider dynamically managing all infrastructure, eliminating server provisioning and charging only for compute time.

Serverless architecture abstracts away all server management—provisioning, patching, and scaling—allowing your team to focus strictly on application code. You deploy functions, like AWS Lambda or Azure Functions, which execute only when triggered by an event: an API call, a database change, or a file upload. This model delivers instant, automatic scaling from zero to peak demand, ensuring high availability without manual oversight. Critically, the pay-per-use billing structure means you only pay for the exact compute duration, often measured in milliseconds, driving significant cost optimization over traditional fixed-capacity models.

https://aws.amazon.com/serverless/