Joomla! Documentation™

• Site Metadata Description is the default metadata description used if such a description is not specified in an article Meta Description field or a menu Meta Description field. If all three are empty the metadata description is omitted from the page output. Search engines often use this to provide descriptive text for a page. If absent, search engines my use text from the content of the page, which may be inappropriate. A description of the purpose of the site of around 20 words is recommended.
• Content Rights sets the rights metadata entry. If appropriate, describe here what rights others have to use this content. This metadata entry is omitted from web pages if this entry is blank. Example: Creative Commons Attribution 4.0 International License. (See: https://creativecommons.org/choose/ for Creative Commons licences.)