When leveraging Azure Functions, developers can take advantage of the pay-as-you-go model, where costs are incurred only when the function is executed. This makes it an ideal choice for building cost-efficient serverless applications that scale automatically to meet demand.

Azure Functions can be used to build serverless applications by writing code in popular languages like C#, JavaScript, or Python. These functions can be triggered by events such as HTTP requests, timers, storage, or message queues. They can be used to process data, integrate with other Azure services, or perform calculations.

By using Azure Functions, developers can benefit from the serverless architecture, where they can focus solely on writing business logic without worrying about provisioning or managing servers. This allows them to build applications quickly and efficiently, reducing time-to-market and operational overhead.

Azure Functions provide developers with a way to write small, single-purpose functions that can be triggered by a variety of events. By utilizing Azure Functions, developers can build serverless applications that automatically scale, respond to events, and execute code in a cost-effective manner.