If we assume that all documents in a link structure having the same quality of content, it always gets the page the highest Pagerank assigned the most incoming links receives. Since the number on a document is very easy to manipulate incoming links to references, the quality of incoming gained a great importance to value for the ranking of a website to find the Pagerank.

The quality of a link increases as a document a link from a topic related site receives. References from related pages are higher than links from sites that deal with a completely different matter assessed. Very good it also affects the Pagerank from when the page from which the link is that the same keywords in high numbers contains, as the side of the link received by. The division into thematically related sites can, for example through the possibility of topics together to realize

Furthermore rated Google, links from web directories (notably Yahoo and ODP) is particularly high. Google believes that a link which is obtained from a web catalog, that is from a report prepared by people links directory, a greater recommendation is because the entries are released in web directories only after the appropriate Web site has been reviewed by an editor on your quality. Method to evaluate the quality of a hyperlink to another is the analysis of the text in links.

Impact of circular references on the pagerank and search engine ranking:

A circular reference describes the mutual linking of sites together (directly or indirectly). A direct example would be if the circular reference site A to site B links to Website B, and simultaneously the return site A links to.

An indirect circular reference is the case when multiple pages are contained in the linking circle.

Example:
Website A links to Site B
Website B links to Site C
Site C links to Site D
D site link to site A

Circular references are from Google on many documents and calculation of time also recognized the Pagerank not weighted. This is only true for external links. A circular reference in a project supported by Google, is not counted as such because the project internally are almost always circular references (eg through a link on the home page of a project document which is contained in each or by the navigation). Rather, you should be careful not to create circular reference when you start as a link exchange with fellow webmasters or the like.

Rules of optimization to increase the PageRank

- Higher quality are primarily external links and fewer links of own documents

- The quality of links is crucial (a few more links from related pages, as many links from unimportant pages)

- Links from sites that already have a high Pagerank, Pagerank also increase their own effective

- Important are links from web directories such as Yahoo and the Open Directory Project

- The link contained in a text is decisive for the quality of the link