Use this section to allow SharePoint to restart IIS on other farm servers. The local server must be restarted manually for ...

Use this section to allow SharePoint to restart IIS on other farm servers. The local server must be restarted manually for the process to complete.  If this option is not selected and you have more than one server in the farm, you must wait until the IIS web site is created on all servers, and then run "iisreset /noforce" on each Web server.  The new IIS site will not be usable until that is completed.