This tool supplies the same results as the Rank Checker tool, these are the PageRank and Alexa Rating. You can use this tool for multiple domain check-ups.PageRank is Google's way of deciding a page's importance.
    It is one of the factors that determines a page's ranking in the search results.PageRank is a numeric value that represents how important a page is on the web. Google figures that when one page links to another page, it is effectively casting a vote for the other page. The more votes that are cast for a page, the more important the page must be.
    Also, the importance of the page that is casting the vote determines how important the vote itself is. Google calculates a page's importance from the votes cast for it. How important each vote is is taken into account when a page's PageRank is calculated.  It isn't the only factor that Google uses to rank pages, but it is an important one.