Site Settings
Site Offline
Set the default Access Level for newly created items.
SEO Settings
Search Engine Friendly URLs
If this option is disabled, Joomla URLs will not contain any keywords and instead look like index.php?option=com_example&task=item.display&id=1 which isn't easy to convey verbally or in writing. Search Engine Friendly (SEF) URLs are more human–readable, e.g. index.php/example/display/something. Despite the setting's name, kept for historical reasons, the URL format no longer has any bearing to how search engines rank your site's pages.
Metadata Settings
Describe what rights others have to use this content.