The heart of our google search is PageRank™, a system for ranking web pages developed by Larry Page and Sergey Brin at Stanford University. It consider website to have a high rank, if other website links to it. Votes from ‘important’ (high pagerank) means higher vote for your website.
You can find out your PageRank at google toolbar. Download it here: http://toolbar.google.com/T4/index_pack_xp.html
Google toolbar is installed at your internet browser, so you can check other websites PageRank from your toolbar.