If URL and Path look correct then please do not change them.
If you are not sure then please contact your ISP or administrator. Usually
the values displayed will work for your site.
Enter your e-mail address, this will be the e-mail address of the site
SuperAdministrator.
The permission settings will be used while installing Joomla! itself, by
the Joomla! addon-installers and by the media manager. If you are unsure
what flags shall be set, leave the default settings at the moment.
You can still change these flags later in the site global configuration.