Besides having a powerful search engine to eliminate noise (exclude domains, authors, languages, feeds,etc.) , duplicate feeds are detected both on-the-fly when adding them, and also from a management console where a bulk duplicate feed is available. So, when there are several articles with the same URL, we won't display them in tracked topics and analytics apps.
In VIP and Premium dashboards, Netvibes' Universal Search provide a powerful and easy way to search through all articles and apps on your Dashboard.
Save your search as a Tracked Topic, and the dashboard will continue to gather and remove duplicates from all articles, posts, photos or other content related to that topic, automatically.