Back in 2007, when Bing was named Live Search, Microsoft introduced their flavor of Google PageRank and cleverly named it “Page Score.” If you verify your site with Bing Webmaster Tools at bing.com/webmaster, you should be able to see your Page Score value, X out of 5 green bars.

This site has 5 green bars for the domain and our top five pages:

But what does “Page Score” actually mean? A Bing Forum thread asked that question and a Bing representative replies saying:

I looked up what the help section of webmaster tools says and it explains page score as:

Forum discussion at Bing Forum.