Explanation
In Azure Automation State Configuration, the Desired State Configuration (DSC) configuration files are used to define the desired state of resources on a system. The structure of the code blocks in a DSC configurationfile should be organized in a logical and meaningful way.
One way to structure the code blocks is as follows:
* Configuration: This block defines the overall configuration, including any parameters that are used in the configuration.
* Node: This blockdefines the target node(s) for the configuration, typically specified by the hostname or IP address of the target system.
* Resource: This block defines the resources that are managed by the configuration, including the resource type, module, and properties.
"A configuration script consists of the following parts:
The Configuration block. This is the outermost script block. You define it by using the Configuration keyword and providing a name. In this case, the name of the configuration is My DscConfiguration.
One or more Node blocks. These define the nodes (computers or VMs) that you are configuring. In the above configuration, there is one Node block that targets a computer named TEST-PC1. The Node block can accept multiple computer names.
One or more resource blocks. This is where the configuration sets the properties for the resources that it is configuring. In this case, there are two resource blocks, each of which call the Windows Feature resource."
https://docs.microsoft.com/en-us/powershell/dsc/configurations/configurations?view=dsc-1.1#configuration-synt