The webpage is a very simple web app that gives you information about different aspects of a webpage as well as its overall reputation.
All you have to do is enter the web page address and click Search. Then you will get a set of relevant data such as a secure page for Google and McAfee, and its pagerank (if it exists).
At the top right you get the overall reputation of the page as a percentage. Although it's definitely how exactly this number comes in.
Specifically not specifically for any content, but it may be interesting to compare your website, contacts, or your website's reputation with competitors.