Microsoft Azure is a cloud computing service that is used for building, testing, deploying, and managing applications.
It provides software as a service (SaaS), platform as a service (PaaS), and infrastructure as a service (IaaS). Azure Functions is a solution that runs on the Microsoft Azure platform and is used to run small pieces of code, or functions, in the cloud. With Azure Functions, you can focus on a specific function without having to focus on the whole application or the infrastructure to run it.