Google Page Rank Algorithm
What is Google PageRank algorithm? It is a mathematical formula used by Google to determine the value of a page when compared against others. It must be kept in mind that Google algorithm update can change at anytime. Few years back PageRank of a web page was very significant to get high position in the SERPs. The term PageRank of Google PageRank is coined by the big G (Google). Yahoo also has such a similar term called ‘Web Rank’. The PageRank of web page can be calculated using the PageRank algorithm. The algorithm says that the PageRank of a web page is the sum of the Page Ranks of all web pages linking to it (its inbound links), divided by the number of links on each of those web pages (its outbound links).
Mathematically the Page Rank algorithm can be represented as follows:
PR(WP) = (1-d) + d [ PR(W1) / O(W1) + ... + PR(Wn) / O(Wn) ]
where PR(WP) is the Page Rank of a web page WP
PR(W1) is the Page Rank of a page W1
O(T1) is the number of outbound links from the web page W1
n is the number of sites that link to webpage WP
d is damping factor in the range 0 < d < 1, usually set to value 0.85
Thus from the above algorithm it can be concluded that there are two factors that can affect the PageRank of a web page.
- The number of incoming links/inbound links to the web page.
- The number of outgoing links/out bound links on the page which points at your page.
The more number of inbound links is better as it helps in increasing the PageRank. The fewer of outbound links on the page which points at your page is also better.
PageRank is also some way related to link popularity. Link popularity is the quality and quantity of inbound links to a website. So the calculation of link popularity depends on the quality and strength of the links, not just on the quantity and volume of links. So, you should be very careful while building and increasing the number of inbound links to your site as it shows its direct effect on the PageRank of the web page.
Some people have in their mind that increasing the PageRank of a web page is too difficult, but it is not so. But Google suggests that before you begin to increase the PageRank of your website and sites individual web pages, you need to evaluate the current PageRank of your site's pages.