This document discusses infrastructure as code using ARM templates and DSC to configure and deploy Azure and SharePoint resources. ARM templates define the desired end state of an environment using JSON files, while DSC (desired state configuration) ensures servers are configured as specified and monitors for drift. Using ARM and DSC together allows for one-click deployments, customized UIs, and defining non-configuration scenarios. The document also describes using DSC at scale with a pull server, extracting configurations from existing environments, and integrating configurations with Azure DevOps for application lifecycles.