Today I’d like to dive a little deeper into what exactly Page Rank (PR) is.
If you want to get the full story, I suggest heading over to Wikipedia. There you’ll find all the fun and fancy math formulas that show you how Page Rank is calculated. I’ll give you a quick overview here.
Basically, the Page Rank of a particular page can be considered its popularity on the internet as a whole. Page Rank comes from a calculation of links pointing to that particular page times a dampening factor to simulate a normal person eventually deciding to stop clicking on links.
Toolbar Page Rank is what Google releases about four times a year for public information. It’s a numeric value between 0 and 10 with 10 being the most popular pages. Google.com has a Page Rank of 10.
The Search Engine Results Page (SERP) Rank is what Google returns whenver a search query is initiated. This is the true Page Rank and is considered to be a primary factor in how well a particular page will rank in the SERPs for a particular term.
Abstractly, you could say that for a particular search the highest PR page would be listed first and then on down the line. In reality, there are many other factors that Google uses to display SERPs. PR is not the only factor involved.
PR is distributed through the internet by links. Each page will pass PR through all links that do not include a “nofollow” tag. The amount of rank passed by each page will then be multiplied by a dampening fact of about .85.
Assume we had only 3 pages on the internet. A, B, and C. Each page starts with a Page Rank that is 1 divided by the total number of pages. In this case, 1 divided by 3. Each page starts with .33 amount of Page Rank.
As you can see here by this example, if we add another page to the internet… say D. We have in essence sliced off a piece of Page Rank for ourselves. 1 divided by 4 (A, B, C, D) gives each page a rank of .25.
Now lets say that we own page C and D, but want page C to have more Page Rank. We simply link page D to page C, but don’t link C back to D. Now Page C will have .4625 Page Rank. (D(.25)*Dampening(.85) + C(.25))
Now that we know what Page Rank is and how it is calculated, the next logical question is: How is it used?
Every time a search is done on the Google search engine, it will return results based on a number of factors. One of which is the Page Rank of a given page. That said, we can use this knowledge to pool Page Rank inside our own websites to have specific pages have a better chance of getting into the SERPs.
Google also requires a minimum amount of Page Rank for your page to even be included inside it’s index. So, just making a page doesn’t mean that you’ll have enough authority to get ranked or even indexed by Google.
Questions or Comments?


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