PageRank is a measure of a Web page’s reputation (credibility).
A Web page that has a high PageRank means it has a good reputation and it will be listed high in the results list when someone does a search query using Google.
PageRank’s scale is 0 – 10.
You can see your Web site’s PageRank using the free Google Toolbar at http://toolbar.Google.com.
I just downloaded it and installed it. I was a bit disappointed as I expected to be able to go to a Web page and see its PageRank number. Instead, the Google Toolbar gives a graphic of a sliding bar. You have to eyeball the graphic and guess the PageRank: “The slider is a bit more than half way, so my PageRank is about 6.”