It explains that the msi file requires a configuration document to install on the server. Think of it as a list of values to make your installation headless instead of using like a wizard.
if you are installing a single-node configuration, then all of the host values are of that node. Find out the FQDN of your machine and insert that into the file. Otherwise, and someone please correct me if I’m wrong, if you are deploying across a grid, you use the configuration file to declare where everything will be installed at for each node you install the software on.
Hope that helps.