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Critical Analysis of Google PageRank Dissemination

Fecha alta: March 17, 2009 05:58:44 AM

Author: Jessica Navarro

Categoría: Negocios y Compras: Marketing

Article

In the SEO community there is a lot of attention paid to PageRank as an indicator of a domain's worth. Although it is one of the most important aspects of a domain's worth in the eyes of Google, there are a few things that should be mentioned.A site can have a high PageRank with relatively few links pointing to it if those links are of a high PageRank.Probably the most important factor in the assignment of PageRank to a web page is the PageRank of the web pages linking to it. So, if a web page has 4 PageRank 4 and 3 PageRank 3 links pointing at it, it will probably be give a PageRank of 4. In addition, pages that have a lot of low PageRank and PageRank N/A links pointing to them can have their PageRank lowered as a result. PageRank is generally not assigned to a web page higher than the pages that link to it. The higher the PageRank of pages linking to a given page, the higher its PageRank is likely to be. The sheer quantity of links does not help to increase PageRank. Pages that don't have any PageRank are often symbolised as having N/A PageRank.First of all, for anyone who doesn't know what PageRank is - it is a value used by Google to decide how important a domain is based on analysis of hyperlinks. The higher the PageRank, the more likely Google is to trust it. Google PageRank has eleven values, between 1 and 10. This is true for both external and internal links. Google assigns each page on the web a score and when one web page links to another it passes some score onto the page it is linking to. Some suggest that the text content of the page affects PageRank assignment, but this doesn't seem to be the case. There is no substantiated evidence that text affects PageRank other than pages that have been spammed often have their PageRank reduced.When it come to sub-pages, time is a factor in PageRank assignment. When new sites first get given PageRank their sub-pages often remain without any PageRank. In general, sub-pages are somewhat slow to get give PageRank. Google is generally less trusting of sub-pages unless they belong to a trusted domain. In particular websites with a lot of sub-pages and even more so sites that link to a lot of internal pages (like directories) can struggle to pass their PageRank to internal pages.The structure of the site has a major role to play in the assignment of PageRank. Google uses what is known as block level analysis to analyses web pages. They use their knowledge of the architecture of the web to decide what links on a page are probably the most important and the pages these links point to are more likely to receive PageRank.Google can and do modify websites' PageRank. This is generally as a penalty for sites that have used unhonest methods. This can often cause all the site's sub-pages to loose their PageRank. It has also been claimed that in the past Google has made mistakes in PageRank assignment.Last but not least, the PageRank of a web page may change even when there has been no change in the hyperlinks pointing to that page. This is either due to changes in the structure of links between all websites or modifications made by Google.Sky Alfaro is an SEO consultant with the SEM Labs SEO Agency where she helps small to medium sized companies with search engine marketing training.

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Critical Analysis of Google PageRank Dissemination

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