Theoretical basics by D Hari Babu (SEO Trainer Srihitha Technologies)

There are many theories about page rank I am trying to give the best information about page ranks to help you to increase page rank of your web pages.

Google was the first search engine company to patent the system of taking into account inbound links, this algorithm was named as page rank. Page rank is estimated separately for each web pages and is determined by page rank- Citation, of other pages referring to it. Page rank is also regarded as the possible frequency of visits to a web page.

The Page Rank of a specified web page is thus defined as the probability that a visitor or a user may visit the web page. It is assumed that the user starts viewing the websites from some random web pages, then the visitor or user follows the links to other web resources. There is always a possibility that the user may leave a web site with out following any outbound links and start viewing documents from a random webpage. The page rank algorithm estimates the probability of this event as 0.15 at each step. The probability that our users or visitors continue surfing by following one of the links available on the current web page is therefore 0.85, assuming that all links are equal in this case. If the user or visitor continues surfing indefinitely, popular web pages will be visited many more times than the less popular web pages. The sum of probabilities for all existing web pages is exactly one because the user or visitor is assumed to be visiting at least one Internet Web page at any given moment.

We can see Google page rank number between zero and ten on the Google tool bar. We can determine the Page Rank value for any web page with the help of the Google Tool Bar that shows a Page Rank value with in the range from 0 to 10.

Usually now a days Page Rank is not used directly in the Google algorithm. Since pure Page Rank characterizes only the number and the quality of inbound links to a Web Site,? it completely ignores the text of links and the information content of referring pages. These factors are important in page ranking and they are taken into account in later versions of the search engine algorithm.

Page Rank does not give exact information about referring web pages, but it allows us to quickly and easily get a feel for the web sites popularity level and to follow trends that may result from seo work Some times each web page on the Net even if there are no inbound links to it initially has a Page Rank greater than zero, although it will be very small There is a tiny chance that a user may accidentally navigate to it. Each web page that has outbound links distributes part of its Page Rank to the referenced page.

The Page Rank contributed to these linked to web pages is inversely proportional to the total number of links on the linked from web page. The more links the web page? has, the lower the Page Rank allocated to each linked-to web page.

There is nothing difficult about the Page Rank influence, after the search engine finds a number of relevant documents using internal text criteria, they can be sorted according to the Page Rank since it would be logical to suppose that a document having a larger number of high-quality inbound links contains the most valuable information Thus, the Page Rank algorithm pushes up those documents that are most popular outside the search engine as well.

There are many discussions about page rank, some of the theories say that current Google ranking algorithm ranks Web pages according to thematic Page Rank it can be explained as, it emphasizes the importance of links from web pages with content related by similar topics or themes. The exact details of this algorithm are known only to Google developers.

It is explained as Google Tool Bar does not show the exact Page Rank probability value, but the Page Rank range a particular web site is in. Each range (from 0 to 10) is defined according to a logarithmic scale.

Example: Each web page has a real Page Rank value known only to Google. To derive a displayed Page Rank range for their Tool Bar, they use a logarithmic scale as shown in this table

 Real PR 1 ? 10 10 ? 100 100 ? 1000 1000 – 10,000 Tool Bar PR 1 2 3 4

This shows that the Page Rank ranges displayed on the Google Tool Bar are not all equal. For example It is easy, to increase Page Rank from 1 to 2, while it is difficult to increase it from six to seven.

Page Rank is mainly used for two purposes practically.

1. To check site popularity quickly.

Page rank is useful when exchanging links between web sites. We can compare the quality of the web page offered in the exchange with web pages from our own web site to decide if the exchange should be accepted. Page rank 4-5 is regarded as site with average popularity; Page rank 6 indicates a very popular web site. While page rank 7 is considered as almost unreachable for a regular webmaster. Web sites with Page rank 8, 9, 10 are normally achieved by the websites of larger companies like Microsoft, Google etc.

1. Evaluation of competitiveness level for a search query.

Although Page Rank is not used directly in the ranking algorithms, it allows us to indirectly evaluate relative websites competitiveness for a particular query. For example, if the search engine displays web sites with Page Rank 7-8 in the top search results, then it is difficult for a website with Page Rank 4 to get to the top of the results list using the same search query.

It is important for every webmaster to recognize that the Page Rank values displayed on the Google Tool Bar are recalculated only occasionally every few months so the Google Tool Bar displaying page rank may be sometimes outdated information. This means that the Google search engine tracks changes in inbound links much faster than these changes are reflected on the Google Tool Bar.