SharePoint get all sites and subsites PowerShell script

SharePoint sites are created very fast. With a few clicks, admins and users can create dozens of sites and subsites. Since it is so easy to create sites, we as admins should have an overview, what is going on at our SharePoint environment. I wrote scripts for this purpose to get all sites and subsites of your SharePoint, so you can trim your SharePoint to your business needs. You will find a script for SharePoint Server and SharePoint Online.