What Is Page Rank? And It's Algorithm Explanation

Most SEOs and people in general do not REALLY know who is the Page Rank ...
Many believe that you can find tools that will show a green bar with values ​​ranging from 0 to 10!

Introduction to Page Rank

The Page Rank (PR) is the main component of the original Google algorithm according to the  original patent that issued Sergey Brin and Larry Page .

+ = Page Rank, where Page is the name of Larry (although it can also be interpreted as "page), and Rank means" rank "or" position. "

This PR is calculated on inbound links, which considered "helpful" and protrusions having a specific page (not even from the original version of PR was given the same weight to all links, much less now !).

It is a floating number, that is, a number containing decimals.  'not in any way an integer between 0 and 10.  People who believe this is because they confuse PR with TBPR

In fact, the PR is not only not a decimal number, but is also believed to be calculated on a logarithmic scale. At what scale? It is speculated that a 6 or an 8, but for starters it is not known if all the PageRanks are calculated with the same scale

To explain this, suppose that a bit is on a logarithmic scale of base 10 and take integer values ​​from 0 to 10 showing TBPR.

A page with a Page Rank 2 has  10 times more  "units" of PR to a page with Page Rank 1. Likewise, a page with a PR 8 has 10 ^ 5 more "units" of a PR with PR 3 ... 10 ^ 5 = 100,000.
's why it's much easier to reach a PR PR 2 to 6 for example.

Here's a picture that may be easier to understand than my explanation lol

Search Engine Land

Many people believe that Page Rank "updated" every 3 or 4 months, but IT'S NOT. There are machines to continuously calculate the Page Rank and continuously  24/7. This Page Rank is calculated iteratively several times a day, through all the pages Google indexes again and again.

What is the Page Rank?

The "real" PR is useful for various things, such as Google, to track the pages of the entire network, beginning with the pages that have the highest Page Rank .

There is also an interesting concept known as "crawl budget", which means that Google is willing to "crawl" (crawl) up to a certain number of pages on your site, and according to Matt Cutts:

The number of pages we crawl is roughly proportional to your Page Rank

See  Eric Enge interview with Matt Cutts for more information

(Of course, if your server takes too long to answer the Google bot will go to track other pages and may not tracked your site completely, but that is another issue)

There's something important to note regarding Page Rank: 

Your original implementation had some flaws as was easily manipulated , they themselves gave rise to the spam that until now have been unable to fully control. When Google began to take hold people realized that just a bunch of links pointing to your site could be positioned in the first place they wanted to search.

Since then Google has been updating and improving their algorithms every day to try to end this situation, two of their most recent updates that address this problem, among others, are: Payday Loan Update and the famous Penguin .
Today it is no longer as easy as before, there are many factors other than Page Rank that are taken into account to position a site in a certain position, some are:

• El “factor Panda”
• Authorship
• Customizing results based on past searches, location, etc..

The Page Rank  NO GREEN BAR  that many believe is (in fact, you may never know the "real" value of your Page Rank, just know that Google and its algorithms). Actually this bar has another name:  TBPR  (Tool Bar Page Rank).

Someone might think:
Well, What cares if the PR is confused with TBPR?

For the average user really does not matter ... But the problem comes when the confusion is between "SEOs" or among people who are interested in improving the ranking of your site, MAINLY BETWEEN "SEOs".

Unfortunately there is no standard or certification "for SEO" so that anyone can say it is and sell their services, and this is good in a way ... unless such person has no idea that he is doing:  If SEO is said someone but can not tell the difference between PR and TBPR, or less tell you are different ... How can SEO be called?

What is TBPR?

Matt Cutts quote again:

Sometime we take our internal Page Rank values, were spent on a scale from 0 to 10 and exported to be visible to users of the Google toolbar

 This "some time" is usually every 3 or 4 months and the rounded value between 0 and 10 that you can check with several tools  IS TBPR.

When the PR is confused with TBPR

So that does not work TBPR
Confusing the Toolbar Page Rank with Page Rank and build on that to make some choices, or have some theories, presents several problems. 3 questions / theories I see more recurring TBPR are related to:

1.My PageRank up, why have not gained a position / had more visits?

There are two main reasons:

• PageRank is only one factor of many that help Google decide which pages and position that "places"
• When you turn the "new value" of that green bar, you're looking at an approximation of the "real" value depl PageRank actually already been incorporated into the way they evaluate / sort the search results from BEFORE the value were exported to TBPR! 
• Hmm that prayer was very long, try to summarize: When you see a change in TBPR, actually that PageRank was already calculated and incorporated into their algorithms before.

2.Yay! It used Page Rank 1 and now I'm Page Rank 3 

or otherwise " :(was Page Rank 3 before and now I'm Page Rank 1 "
Neither is technically correct, the data provided Google are not the most recent ... In fact, SOMETIMES GOOGLE RETURN VALUES FOR THAT RANDOM TBPR!
As one of the measures to implement this so that people do not compulsively checking the PR of any page, or massively by using some software,  Google sometimes returns random values ​​of Page Rank .

3.And finally, I think it is most common that I see every day regarding the Page Rank:  ?

 want to buy a link / review, what Page Rank does your site : The
really surprised to see still to SEOs to determine whether buy (or solicit) any link or review on the basis of that green bar ... Seriously, there are so many more important things to look, just do not understand! Maybe you're wondering ! But then what else is there need to look? Well, me a couple of things come to mind:

• The relationship of the site to your topic.  If you get a link from a site that talks about volleyball to a site that talks about bats ... Do not expect visitors to send you regular readers or customers you again.
• The number of visits you can send.  prefer a link within a blog article related to the theme of the site with a TBPR 1, a link in the footer of a site with TBPR 5 to make on a completely different topic (Pssst This does not mean ... that the various thematic links "are useless")

Going back a 1. little point, I add: There is no direct relationship between TBPR a site and its position in Google for a particular search . We now show three examples of searches where NOT HAPPEN:

So you can serve TBPR

Now, after all that does NOT work or should not be based on TBPR, a couple of things for which YES can work:

Usually when there is suddenly an unexplained drop in TBPR a site, for example you have ripped from 5-2 MAY be because Google suspects, or be sure, that the site in question sells bonds WITHOUT TAG NOFOLLOW is say, selling links that pass Page Rank. A real case of this can be read in the  blog of Matt Cutts .

If you take a record of your competition TBPR either monthly, bimonthly or another, have some fun facts you can use COMPARATIVELY to determine who may be doing something and do not want SEO. Eye, you have a 3 and a TBPR one of TBPR 2 is a fact that by itself says nothing ... But if your competition in a month had a TBPR 1, then 3 and then had had 5 So something is happening !

Many people who know the difference between TBPR and PR PR to keep calling TBPR (hope I have not confused :P) for convenience, by consensus, because, really do not know.

What I do know is that if you suddenly start talking about TBPR few will understand you je, you can call PR or call as you want, it is important to understand the difference between the Toolbar PageRank and PageRank and stop make important decisions based ONLY on that green bar