Google PageRank Assignment Dissected |
| Date Added: March 17, 2009 02:26:24 AM |
| Author: Jessica Navarro |
| Category: Business: E-Commerce: Website Promotion: Search Engine Optimization Firms |
| In the SEO arena there is a lot of attention paid to PageRank as an indicator of a domain's worth. Although it is probably 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. The sheer quantity of links does not help to increase PageRank. So, if a web page has 4 PageRank 4 and 3 PageRank 3 links pointing at it, it will probably be assigned a PageRank of 4. Probably the most important factor in the distribution of PageRank to a web page is the PageRank of the web pages linking to it. It should be noted, web pages that have a lot of low PageRank and PageRank N/A hyperlinks pointing to them can have their PageRank reduced as a result. PageRank is generally not assigned to a web page higher than the pages that link to it. A website can have a high PageRank with relatively few links pointing to it if those links are of a high PageRank.The higher the PageRank of web pages linking to a given page, the higher its PageRank is likely to be. The higher the PageRank, the more likely Google is to trust it. Pages that don't have any PageRank are often referred to as having N/A PageRank.First of all, for whose who don't know what PageRank is - it is a metric used by Google to determine how important a domain is based on analysis of hyperlinks. Google assigns each page on the internet a score and when one web page links to another it passes some weight onto the page it is linking to. This holds true for both external and internal hyperlinks. Google PageRank has eleven values, between 1 and 10. There are those that suggest that the text content of a 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, the time Google has known about them 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 a little 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 really struggle to pass their PageRank to internal pages. The structure of the site has a major role to play in the distribution of PageRank. Google uses what is known as block level analysis to analyses web pages. They use their vast knowledge of the structure 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 be assigned 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 distribution. Finally, the PageRank of a web page may change even though 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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