Google Page Rank

Summed up briefly, the “Page Rank” is a number from 0 to 10 that Google gives to each page in it’s index and which represents the popularity of that page on the web.

How is page rank calculated?

The way in which Google calculates the page rank is based upon links between pages. Each link from one page to another represents a vote to the page the link points to. Basicaly, the more links page receives, the higher its importance becomes. However, o “vote” can be more or less important, depending on the page that cast it.

Google updates the pagerank visible in the Google toolbar from time to time. The PR displayed is not the current page rank of the URL, but the one from the last toolbar pagerank export. These exports take place about 3 or 4 times per year.

No follow links

Search engines have come up with a way of removing the “vote” automatically passed by a link from page A to page B. This, however, is entirely the webmaster’s decision: if he doesn’t want to the links on a page to pass page rank he will simply add an attribute to each one: rel=”nofollow” This way, most of the search engines will not add to page B’s pagerank.