Google Page Rank – A Beginners Guide

Toolbar Pagerank and Pagerank are two different, unsynchronised measurements based on the number and quality of links that pass pagerank to a particular page.

Google Toolbar Pagerank Not Visible? Just because a page has a Toolbar grey bar does not mean a page has no real pagerank – it can mean that of course, but it can mean other things. I’ve theorised Toolbar Grey Pages do not pass pagerank to external sites, and may be an indication Google has an issue with the page.

A white Google Toolbar generally signifies that the page has a measure of Real Pagerank, and that Pagerank score will be reflected in the next Pagerank update (which happens whenever Google decides will happen) – one of the most common questions about Pagerank is “When Is The Next Google Pagerank Update?

The fast way to lose PR is to openly sell links on your website. This is now officially against Google Webmaster Guidelines for inclusion.

The most common reason for a drop in Toolbar Pagerank is simply your website is recieving less Pagerank via the links it has pointing to it from other sites. This could be because the pages those links on them have less PR to give, the links themselves have dissappeared and no linger point to your site, or Google has in fact changed the way Pagerank works.

At the moment, a tangible effect when Google penalizes a site, is a reduction of visible Toolbar PR. Many sites who openly manipulated Google SERPS via paid review blogging and link-selling had their Google PR dramatically reduced in the last quarter of 2007 in Google’s opening salvo in the “war on paid links‘, or so Google would have us believe.

Toolbar PR has little or no effect on amount of visitors Google will send you – believe me. Perhaps this is why bloggers who had PR devalued reported no loss of visitors from Google. A reduction in real PR however could see less pages on your site being indexed.

Many believe Google can’t find all paid links, and are using the Google Toolbar to spread FUD,

If you install the Google Toolbar you will see a green indicator in your Internet Explorer / Firefox toolbar showing you the Google Page Rank of the page. Hovering over the green bar will give you a number which is the page’s Google Page Rank.

It’s accepted that Toolbar Pagerank is more than a few months out of date as little as 2 weeks out of date by my observations. That is, Toolbar PR and Real PR.


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New Google Update

pparently, Google is showing signs of mixed and changing results at present. It struck us when our clients reported seeing different rankings for their websites at their ends, compared to our observations of their ranks from our location in Chicago. One of them reports seeing his website on the first page while we were stunned to find it on the second page at the same time. When we confirmed this with other clients in other locations, it showed the same behavior. It seems that an update is already taking place.
Normally, one would expect this phenomenon to be observed on Fridays but it appears to be different today.
So if Google is unfolding an update, be cautioned as you might find your ranks to change from what they are now to something different the next day.

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Google Toolbar PageRank Update (New Years 2010)

Almost exactly like last year, Google is pushing out a New Years PageRank Update now. Mid-December we reported PageRank shifts or penalties and today, there are wide spread reports of a PageRank update in the Google Toolbar.
It is a bit funny, because last New Years, we reported in mid-December a PR shuffle and then on December 31, 2008 we reported an official PageRank update in the toolbar. It is almost exactly the same way this year. Today, December 31, 2009, we are reporting the 2010 New Years PageRank update.
The last toolbar PageRank update before today was in October. Like I always say, Toolbar PageRank is not of great use to SEOs. It is often months out of date and does not determine a rank of a web page. So please do not obsess over Toolbar PageRank.
For those who saw their toolbar PageRank go up, congrats on the 'badge' and here is to an even higher PR in 2010!
Forum discussion at WebmasterWorld, Google Webmaster Help, Search Engine Watch Forums and DigitalPoint Forums.

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new update 2010

  As a user, I like the new interface too. With regard to AdWords, I think that it may in fact help the AdWords listings at the top. Not clear what it will do to the top organic listings. It may also increase use of Google's vertical channels (ie, Videos, News, Blogs, Shopping, etc). The interface design pulls emphasis back up to the top of the screen, which I'm assuming is where Google wants it.
I remember after the introduction of Universal Search that Gord Hotchkiss discussed new eye-tracking heatmap studies he'd done, which indicated that the former "F"-shaped heatmap pattern had been replaced by a pattern that was closer to an "E" shape. With text-only SERPs, eye-tracking studies showed that user focus started at the top left, moved across the page to points of interest and then gradually down, describing an "F"-shaped pattern that became known as the "golden triangle."
But with Universal Search's addition of thumbnails in the left column, the eye's attention was pulled from the top left starting point more quickly down to the image thumbnails, and then it moved across to the right, describing more of an "E" pattern than an "F" pattern. I remember there was quite a bit of discussion at the time about what this might do to AdWords click-throughs, the assumption being that the images on the left side would draw attention not only away from the top, but also away from the ads on the right.
Key components of the new design are the Google logo and the dark blue (with white lettering) "Everything" bar in the upper left, the bold font in the search box, and the dark blue "Search" bar to the right of the search window. These all attract the eye to the top of the page.
On a search for a well-known product, eg, I'm seeing that the top two ads are essentially framed on the top left by Google-colored icons for the most popular Google vertical channels, and in the right AdWords column by the top ad, which features a c82-px square product shot. I should note also that the second ad at the top has a dark blue Google Checkout logo, essentially in the lower right corner of the top add block, which is the same dark blue as the "Search" button. I'll be interested to see how this interface does.
Very clean, and while the ads feel more prominent, they are also easily distinguishable from the organic results. The block of Shopping results in position #3 is more problematic.

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Judge who said 'Rathore being harassed'

A shocking conflict of interest has come to the fore n the Ruchika Girhotra molestation case. The presiding judge was in fact, Ruchika's next door neighbour and is said to be harbouring some amount of hard feelings towards Ruchika's family. However, Judge Khaturia of the Punjab and Haryana High Court -- the man responsible for the meager 6 month sentence handed to ex DGP SPS Rathore, seemed to be more concerned about the accused rather than the victim. Justice Khaturia contended that it was Rathore, who was being harassed. Speaking to TIMES NOW, Ruchika's friend Adhunika made the shocking revelation saying, "Khaturia, who was the judge of HC, who dropped the charges of Section 306, you would be amazed to know that he was the next door neighbour of Ruchika. Knowing that, Khaturia knows that if you know a person you are not allowed to make any judgement in that case. He not only gave the judgement, but also dropped the charges of abetment to suicide." "It was some political interference or SPS Rathore's influence. If you know somebody, even if he or she is your neighbour, you cannot give any bias decision. Either he should have sent this to some other judge or done something about it," added Adhunika. Copy rights by google

IP Addresses and Domains of Google's Data Centers

The progression of a Google Dance could basically be watched by querying the IP addresses of Google's data centers. But queries on the IP addresses are normally redirected to www.google.com. However, Google has domains which resolve to the single data centers' IP addresses. These domains as well as their IP addresses are shown in the following list.

Domain	IP-Adresse
www-ex.google.com	216.239.33.100
www-sj.google.com	216.239.35.100
www-va.google.com	216.239.37.100
www-dc.google.com	216.239.39.100
www-ab.google.com	216.239.51.100
www-in.google.com	216.239.53.100
www-zu.google.com	216.239.55.100
www-cw.google.com	216.239.57.100
www-fi.google.com	216.239.41.100
www-gv.google.com	216.239.59.100
www-kr.google.com	66.102.11.100
www-mc.google.com	66.102.7.100
www-lm.google.com	66.102.9.100

Those that keep an eye on Google's index updates often think that the Google Dance is over, when they see the new index at www.google.com or when they don't see the old index at www.google.com for some time. In fact, the update is not finished until all the domains listed above provide results from the new index.
The index updates at the single data centers seem to happen at one point in time. As soon as one data center shows results from the new index, it won't switch back to the old index. This happens most likely because the index is redundant at each data center and at first, only one part of the servers (eventually half of them) is updated. During this period, only the other half of the servers is active and provides search results. As soon as the update of the first half of servers is finished, they become active and provide search results while the other half receives the new index. Thus, from the user's perspective, the update of one data centers happens at one point in time.
Finally, it shall be noted that the access to the single data centers is generally controlled by the DNS only, but sometimes queries are redirected. However, this is easy to detect: When for a query at one of the domains listed above, the links to Google's cache do not comply with the IP address that belongs to the domain, then the query is redirected. If this happens, Google inhibits - for whatever reason - the access to one data center.

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Google Dance and DNS

Not only Google's index is spread over more than 10,000 servers, but also these servers are, as of now, placed in 13 different data centers. These data centers are mainly located in the US (i.e. Santa Clara, California and Herndon, Virginia) and in Dublin, Ireland.
In order to direct traffic to all these data centers, Google could thoeretically record all queries centrally and then send them to the data centers. But this would obviously be inefficient. In fact, each data center has its own IP address (numerical address on the internet) and the way these IP addresses are accessed is managed by the Domain Name System.
Basically, the DNS works like this: On the Internet, data transfers always take place in-between IP addresses. The information about which domain resolves to which IP address is provided by the name servers of the DNS. When a user enters a domain into his browser, a locally configured name server gets him the IP address for that domain by contacting the name server which is responsible for that domain. (The DNS is structured hierarchically. Illustrating the whole process would go beyond the scope of this paper.) The IP address is then cached by the name server, so that it is not necessary to contact the responsible name server each time a connection is built up to a domain.
The records for a domain at the responsible name server constitute for how long the record may be cached by a caching name server. This is the Time To Live (TTL) of a domain. As soon as the TTL expires, the caching name server has to fetch the record for a domain again from the responsible name server. Quite often, the TTL is set to one or more days. In contrast, the Time To Live of the domain www.google.com is only five minutes. So, a name server may only cache Google's IP address for five minutes and has then to look up the IP address again.
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