Keep users updated on new content

From both a user, manager and company perspective we would like to keep everyone updated when new content relevant to them is published.

I would like to have a 'Notification center' where I can manage all notifications:

• Define list of criteria for what content should trigger a notification (News in my content, new items in my saved searches, processes in a certain area, all new documents, collaboration, star marked content, ...)
• How often I should get a notification (All, daily, weekly)
• Channel for the notification (e-mail, in app, ...)
• As a manager be able to define notifications for my team (team members should see this in their notification center as well)