Azure Event Hub integrates with Azure Functions for a serverless architecture. Microsoft calls it a “Serverless Event Processing” - https://docs.microsoft.com/en-us/azure/architecture/reference-architectures/serverless/event-processing#:~:text=Azure%20Functions%20is%20a%20serverless,writes%20the%20results%20to%20storage.
Using serverless event processing, Event-based cloud automation is possible and can dramatically improve productivity of DevOps team. Microsoft exposes several patterns on cloud automation with Azure Function App. : https://docs.microsoft.com/en-us/azure/architecture/reference-architectures/serverless/cloud-automation