The basic idea of the PageRank algorithm is to look at incoming links to a website as a recommendation. The more links point to a page, the more important this. The scale of PageRank is from 0 to 10, with the value 10 represents the upper end, and very few sites have a PageRank of 10 (in Germany there is not one).

This page gets a lot of incoming links a higher PageRank, and the higher the PageRank of the link submitter site, the higher the value of the link receiving side. The idea is that a link (recommendation) from an important page (higher PageRank) is worth more than a page that itself has a low PageRank.

The concept of PageRank was Larry Page and Sergey Brin at Stanford University designed by and led to the creation of Google, by two. This result was initially based solely on the PageRank of matches sorted fast. The set is a revolution, as to time, the search engine web pages only have it until then evaluated how often search words in the text and meta tags that occurred.

The PageRank rating of individual web pages and sub pages is different to the navigation depth, for example in climate in Paraguay , Application of dogs or portable hard disk card reader. The PageRank of a completely new web site is initially 0, as in this Portal for press releases.

The PageRank was therefore an innovation in online marketing by webmasters, the positions of its pages in search results should not so easily manipulated. This novel method of valuation search engine is also due to the great success of Google, since it ends the search much more relevant search results provided for than other search engines.

However, it turns out that the star rating system is also not useful as the only criterion is there is influence by link exchange, link buying and eg web directories available on the PageRank relatively easy. The PageRank is indeed still used for the evaluation of sites by Google, but not more that weight as before. Meanwhile, Google indicates that sorting is done the results by over 100 different criteria, although the PageRank still plays a very important role.