Showing posts with label PageRank Calculations. Show all posts
Showing posts with label PageRank Calculations. Show all posts

Reason Why Your Rankings Suddenly Drop

First of all let me state that there are several reason why a site rankings drop so fast. The most common reason is because your website has very few backlinks. Some twenty backlinks on your linkspage are a surefire sign you have too many little backlinks.

If your competitors are getting more backlinks then you are, they outrank you and your rankings drop.

Rankings won't drop because you have some incorrect information on your website or some false keyword density.

First you need to start getting backlinks, everyday get around 15-30. You can get more than that but the important thing is you get same number of links everyday. A 100 everyday will be difficult while 15-30 is realistic.

The concept behind it.

Getting backlinks regularly like that means something important to the search engines. It means your website is very good, since everyday people are linking to it. That is what search engines think when they see new backlinks everyday.

So it's easy. 15-30 is not that big and with certain automated software you can get 50, 100 or more daily.

If you are going to get backlinks create a link directory on your website. A one page links page is not a well created directory. It must contain categories and subcategories and link from the homepage.

You can invest in some scripts that that creates such directories, there are many of them.

OutBound Links means links pointing to another website from your own. In simple terms linking to another website is like giving them some of your pagerank, they get rewarded and you do not want to reward your competitors or any other website.

You link to other websites on your links page and if they do not link back you can and should remove their link from your website. That also makes a difference in your rankings.

When doing SEO it is a good idea to focus on one few keywords. Find some 3 or 4 and focus on getting backlinks, changing the anchor text in the backlinks using all keywords. So it's like optimizing your homepage for 3 or 4 keywords only. A great start to get some traffic and money. Then you can optimize some other pages for some other keywords, or the same page for new keywords. You also become good at SEO and you get some experience.

When creating meta tags make sure your other site pages have different meta tags, not identical.

So the very important things are the number and quality of backlinks you have. Give the search engines what they need in order to reward you with high rankings.

Protecting your Search Engine Ranking...

Your website's ranking on search engines is a vital element of your overall marketing campaign, and there are ways to improve your link popularity through legitimate methods. Unfortunately, the Internet is populated by bands of dishonest webmasters seeking to improve their link popularity by faking out search engines.

The good news is that search engines have figured this out, and are now on guard for "spam" pages and sites that have increased their rankings by artificial methods. When a search engines tracks down such a site, that site is demoted in ranking or completely removed from the search
engine's index.

The bad news is that some high quality, completely above-board sites are being mistaken for these web page criminals. Your page may be in danger of being caught up in the "spam" net and tossed from a search engine's index, even though you have done nothing to deserve such harsh treatment. But there are things you can do - and things you should be sure NOT to do - which will prevent this kind of mis perception.

Link popularity is mostly based on the quality of sites you are linked to. Google pioneered this criteria for assigning website ranking, and virtually all search engines on the Internet now use it. There are legitimate ways to go about increasing your link popularity, but at the same time, you
must be scrupulously careful about which sites you choose to link to. Google frequently imposes penalties on sites that have linked to other sites solely for the purpose of artificially boosting their link popularity. They have actually labeled these links "bad neighborhoods." You can raise a toast to the fact that you cannot be penalized when a bad neighborhood links to your site; penalty happens only when you are the one sending out the link to a bad neighborhood. But you must check, and double-check, all the links that are active on your links page to make sure you haven't linked to a bad neighborhood.

The first thing to check out is whether or not the pages you have linked to have been penalized. The most direct way to do this is to download the Google toolbar at http://toolbar.google.com. You will then see that most pages are given a "Pagerank" which is represented by a sliding green scale on the Google toolbar. Do not link to any site that shows no green at all on the scale. This is especially important when the scale is completely gray. It is more than likely that these pages have been penalized. If you are linked to these pages, you may catch their penalty, and like the flu, it may be difficult to recover from the infection. There is no need to be afraid of linking to sites whose scale shows only a tiny sliver of green on their scale.

These sites have not been penalized, and their links may grow in value and popularity. However, do make sure that you closely monitor these kind of links to ascertain that at some point they do not sustain a penalty once you have linked up to them from your links page.

Another evil trick that illicit webmasters use to artificially boost their link popularity is the use of hidden text. Search engines usually use the words on web pages as a factor in forming their rankings, which means that if the text on your page contains your keywords, you have more of an opportunity to increase your search engine ranking than a page that does not contain text inclusive of keywords.

Some webmasters have gotten around this formula by hiding their keywords in such a way so that they are invisible to any visitors to their site. For example, they have used the keywords but made them the same color as the background color of the page, such as a plethora of white keywords on a white background. You cannot see these words with the human eye - but the eye of search engine spider can spot them easily! A spider is the program search engines use to
index web pages, and when it sees these invisible words, it goes back and boosts that page's link ranking.

Webmasters may be brilliant and sometimes devious, but search engines have figured these tricks out. As soon as a search engine perceive the use of hidden text - splat! the page is penalized.

The downside of this is that sometimes the spider is a bit overzealous and will penalize a page by mistake. For example, if the background color of your page is gray, and you have placed gray text inside a black box, the spider will only take note of the gray text and assume you are employing hidden text. To avoid any risk of false penalty, simply direct your webmaster not to assign the same color to text as the background color of the page - ever!

Another potential problem that can result in a penalty is called "keyword stuffing." It is important to have your keywords appear in the text on your page, but sometimes you
can go a little overboard in your enthusiasm to please those spiders. A search engine uses what is called "Keyphrase Density" to determine if a site is trying to artificially boost their ranking. This is the ratio of keywords to the rest of the words on the page. Search engines assign a limit to the number of times you can use a keyword before it decides you have overdone it and penalizes your site.

This ratio is quite high, so it is difficult to surpass without sounding as if you are stuttering - unless your keyword is part of your company name. If this is the case, it is easy for keyword density to soar. So, if your keyword is "renters insurance," be sure you don't use this phrase in every sentence. Carefully edit the text on your site so that the copy flows naturally and the keyword is not repeated incessantly. A good rule of thumb is your keyword should never appear in more than half the sentences on the page.

The final potential risk factor is known as "cloaking." To those of you who are diligent Trekkies, this concept should be easy to understand. For the rest of you?cloaking is when the server directs a visitor to one page and a search engine spider to a different page. The page the spider sees is "cloaked" because it is invisible to regular traffic, and deliberately set-up to raise the site's search engine ranking. A cloaked page tries to feed the spider everything it needs to rocket that page's ranking to the top of the list.

It is natural that search engines have responded to this act of deception with extreme enmity, imposing steep penalties on these sites. The problem on your end is that sometimes pages are cloaked for legitimate reasons, such as prevention against the theft of code, often referred to as

"pagejacking." This kind of shielding is unnecessary these days due to the use of "off page" elements, such as link popularity, that cannot be stolen.

To be on the safe side, be sure that your webmaster is aware that absolutely no cloaking is acceptable. Make sure the webmaster understands that cloaking of any kind will put your website at great risk.

Just as you must be diligent in increasing your link popularity and your ranking, you must be equally diligent to avoid being unfairly penalized. So be sure to monitor your site closely and avoid any appearance of artificially boosting your rankings.

How Google Page Rank is Calculated?

This is where it gets tricky. The PR of each page depends on the PR of the pages pointing to it. But we won’t know what PR those pages have until the pages pointing to them have their PR calculated and so on… And when you consider that page links can form circles it seems impossible to do this calculation!

But actually it’s not that bad. Remember this bit of the Google paper:

PageRank or PR(A) can be calculated using a simple iterative algorithm, and corresponds to the principal eigenvector of the normalized link matrix of the web.

What that means to us is that we can just go ahead and calculate a page’s PR without knowing the final value of the PR of the other pages. That seems strange but, basically, each time we run the calculation we’re getting a closer estimate of the final value. So all we need to do is remember the each value we calculate and repeat the calculations lots of times until the numbers stop changing much.

Lets take the simplest example network: two pages, each pointing to the other:

Each page has one outgoing link (the outgoing count is 1, i.e. C(A) = 1 and C(B) = 1). Guess 1

we don’t know what their PR should be to begin with, so let’s take a guess at 1.0 and do some calculations: d = 0.85 PR(A) = (1 â€" d) + d(PR(B)/1) PR(B) = (1 â€" d) + d(PR(A)/1)

i.e. PR(A) = 0.15 + 0.85 * 1 = 1 PR(B) = 0.15 + 0.85 * 1 = 1

Hmm, the numbers aren’t changing at all! So it looks like we started out with a lucky guess!!! Guess 2

No, that’s too easy, maybe I got it wrong (and it wouldn’t be the first time). Ok, let’s start the guess at 0 instead and re-calculate: PR(A) = 0.15 + 0.85 * 0 = 0.15 PR(B) = 0.15 + 0.85 * 0.15 = 0.2775 NB. we’ve already calculated a “next best guess” at PR(A) so we use it here

And again: PR(A) = 0.15 + 0.85 * 0.2775 = 0.385875 PR(B) = 0.15 + 0.85 * 0.385875 = 0.47799375

And again PR(A) = 0.15 + 0.85 * 0.47799375 = 0.5562946875 PR(B) = 0.15 + 0.85 * 0.5562946875 = 0.622850484375

and so on. The numbers just keep going up. But will the numbers stop increasing when they get to 1.0? What if a calculation over-shoots and goes above 1.0?

Guess 3

Well let’s see. Let’s start the guess at 40 each and do a few cycles:

PR(A) = 40 PR(B) = 40

First calculation PR(A) = 0.15 + 0.85 * 40 = 34.15 PR(B) = 0.15 + 0.85 * 34.15 = 29.1775

And again PR(A) = 0.15 + 0.85 * 29.1775 = 24.950875 PR(B) = 0.15 + 0.85 * 24.950875 = 21.35824375

Yup, those numbers are heading down alright! It sure looks the numbers will get to 1.0 and stop

Here’s the code used to calculate this example starting the guess at 0: Show the code | Run the program

* Principle: it doesn’t matter where you start your guess, once the PageRank calculations have settled down, the “normalized probability distribution” (the average PageRank for all pages) will be 1.0