For questions relating to the Sitecore Install Framework introduced in Sitecore 9.
The Sitecore Install Framework (SIF) enables users to deploy and configure a Sitecore environment using a standard configuration design that can be extended through custom PowerShell functions.
https://dev.sitecore.net/Downloads/Sitecore_Installation_Framework.aspx
Useful blogs:
http://www.rockpapersitecore.com/2017/10/sitecore-installation-framework-sif-and-https-everywhere/
https://kamsar.net/index.php/2017/11/The-lazy-way-to-install-Sitecore-9/