Azure Functions is Microsoft's serverless computing service that allows developers to run code in response to events without managing servers or infrastructure. It is designed to build lightweight, scalable, and event-driven applications. One of its biggest advantages is automatic scaling. Azure Functions automatically increases or decreases computing resources based on workload, ensuring applications remain responsive while optimizing costs. Organizations only pay for the execution time and resources consumed, making it highly cost-effective. Azure Functions integrates easily with services such as Azure Storage, Service Bus, Event Grid, Cosmos DB, HTTP APIs, and Microsoft Power Platform. It is commonly used for background processing, scheduled jobs, file processing, API development, IoT event handling, data transformation, and workflow automation. Its support for multiple programming languages, built-in monitoring through Azure Monitor and Application Insights, and seamless integration with Azure DevOps make it an ideal choice for developing modern cloud-native applications.