Google News: What is a news hub
News hub is a term used in Google news for labeling sections of a website which lists and links to individual article pages. A news sitemap is also considered a news hub as it helps the robots discover new pages on a website.
[edit] What can act as a news hub
Any page can act as a news hub but individual article pages and static pages like "Privacy Policy". A news hub may be a website's homepage, its category page where links to articles from the specific category are listed or a tag page where links to articles labeled with the specific tag are listed.
[edit] Example news hubs
NY Times homepage - http://nytimes.com/
NY Times National News - http://www.nytimes.com/pages/national/index.html
Washington Post - http://www.washingtonpost.com/
Washington Post Opinion Home - http://www.washingtonpost.com/wp-dyn/content/opinions/?nid=roll_opinmain