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FREE TOOL TO CHECK GOOGLE PAGE RANK !

Page Rank checker is a free service to check Google™ page rank instantly via online PR checker or by adding a PageRank checking button to your web pages

Google PageRank (Google PR) is one of the methods Google uses to determine a page’s relevance or importance.Important pages receive a higher PageRank and are more likely to appear at the top of the search results.Google PageRank (PR) is a measure from 0 -10.Google Pagerank is based on backlinks. The more quality backlinks the higher google pagerank. Improving your Google page rank (building quality backlinks) is very important if you want to improve your search engine rankings.

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Check Google PAGE RANK of Web site pages Instantly

More about PageRank:

Page Ranks Example

Mathematical PageRanks for a simple network, expressed as percentages. (Google uses a logarithmic scale.) Page C has a higher PageRank than Page E, even though there are fewer links to C; the one link to C comes from an important page and hence is of high value. If web surfers who start on a random page have an 85% likelihood of choosing a random link from the page they are currently visiting, and a 15% likelihood of jumping to a page chosen at random from the entire web, they will reach Page E 8.1% of the time. (The 15% likelihood of jumping to an arbitrary page corresponds to a damping factor of 85%.) Without damping, all web surfers would eventually end up on Pages A, B, or C, and all other pages would have PageRank zero. In the presence of damping, Page A effectively links to all pages in the web, even though it has no outgoing links of its own.

Algorithm

PageRank is a probability distribution used to represent the likelihood that a person randomly clicking on links will arrive at any particular page. PageRank can be calculated for collections of documents of any size. It is assumed in several research papers that the distribution is evenly divided among all documents in the collection at the beginning of the computational process. The PageRank computations require several passes, called “iterations”, through the collection to adjust approximate PageRank values to more closely reflect the theoretical true value.

A probability is expressed as a numeric value between 0 and 1. A 0.5 probability is commonly expressed as a “50% chance” of something happening. Hence, a PageRank of 0.5 means there is a 50% chance that a person clicking on a random link will be directed to the document with the 0.5 PageRank.

Simplified algorithm

Assume a small universe of four web pages: ABC and D. Links from a page to itself, or multiple outbound links from one single page to another single page, are ignored. PageRank is initialized to the same value for all pages. In the original form of PageRank, the sum of PageRank over all pages was the total number of pages on the web at that time, so each page in this example would have an initial PageRank of 1. However, later versions of PageRank, and the remainder of this section, assume a probability distribution between 0 and 1. Hence the initial value for each page is 0.25.

The PageRank transferred from a given page to the targets of its outbound links upon the next iteration is divided equally among all outbound links.

If the only links in the system were from pages BC, and D to A, each link would transfer 0.25 PageRank to A upon the next iteration, for a total of 0.75.

PR(A)= PR(B) + PR(C) + PR(D).,

Suppose instead that page B had a link to pages C and A, while page D had links to all three pages. Thus, upon the next iteration, page B would transfer half of its existing value, or 0.125, to page Aand the other half, or 0.125, to page C. Since D had three outbound links, it would transfer one third of its existing value, or approximately 0.083, to A.

PR(A)= frac{PR(B)}{2}+ frac{PR(C)}{1}+ frac{PR(D)}{3}.,

In other words, the PageRank conferred by an outbound link is equal to the document’s own PageRank score divided by the number of outbound links L( ).

PR(A)= frac{PR(B)}{L(B)}+ frac{PR(C)}{L(C)}+ frac{PR(D)}{L(D)}. ,

In the general case, the PageRank value for any page u can be expressed as:

PR(u) = sum_{v in B_u} frac{PR(v)}{L(v)},

i.e. the PageRank value for a page u is dependent on the PageRank values for each page v contained in the set Bu (the set containing all pages linking to page u), divided by the number L(v) of links from page v.

Credit: wikipedia.org, prchecker.info

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