Serverless is a cloud-computing execution model in which the cloud provider runs the server, dynamically managing the allocation of machine resources. In a serverless architecture, developers write code that is executed in stateless containers, which are fully managed by the cloud provider. This model allows developers to focus on writing application logic without worrying about server management, scaling, or maintenance. Serverless platforms, such as AWS Lambda, Azure Functions, and Google Cloud Functions, automatically scale applications in response to demand and charge based on the actual usage, providing cost-efficiency and operational simplicity. Serverless architectures are ideal for event-driven applications, microservices, and workloads with variable or unpredictable traffic.