Our discovery services help you assess the quality of websites you visit, as well as find similar sites with a single click. For example, when you search on Google or other search engines, we compare your search results against data on our servers in order to recommend sites that have been frequently bookmarked. Our discovery services are powered by analyzing anonymously and in aggregate the millions of bookmarks on our servers--in this way we are leveraging the wisdom of crowds. Source: Xmarks 3.1.0