When to use Azure Landing Zones

Azure Landing Zones allows you to migrate applications, modernize and innovate at Enterprise scale. It gives you few different ways to adopt your existing application structure to Azure cloud. It's coupled with Microsoft Cloud Adaption Framework making sure the standards are meet. 

Below are few different resources to understand more on Azure Landing Zones.

https://medium.com/azure-architects/azure-landing-zones-scenario-walkthrough-f38596092fdc

https://docs.microsoft.com/en-us/azure/cloud-adoption-framework/ready/landing-zone/terraform-landing-zone