The Google PageRank of each website is between 0 and 10, is given by its bots to order pages in term of interest: 0 is the worst, 10 is the best.
It's usual to see webmasters display the pagerank of their website on the main website to prove to their visitors that their website is great!
This website allows you to display your PageRank in an image: all you need to do is to write the URL of your website in the form and the website will generate a script to put in your HTML webpages, this one will display your pagerank, it's updated constantly!