What is PageRank Google'b and how to receive it on a maximum
The reason on which this clause{article} has appeared
Not so long ago one widely known clause{article} « That such PehjdzhRank » to which the majority of people addresses when the question - that such PehjdzhRank and as he works wants to understand for itself has got to me on eyes. If it is fair, I and to her used. However, when I wrote Calculator PejdzhRanka, to me have occurred, that this clause{article} is incorrect from the point of view of made calculations. In her own form PehjdzhRanka which the author names is used "pass - rank". Pass - rank, for not clear reasons, uses the formula which is distinct from Guglovskogo PehjdzhRanka because of what results of calculations become incorrect.
In spite of the fact that as a result of a spelling of these and subsequent clauses{articles} the author denies pass - rank, original clause{article} about pass - ranke remains on the Internet. Therefore, if to you clause{article} « That such PehjdzhRank » it is better to forget about her is known.
What is PehjdzhRank?
PehjdzhRank represents numerical value which reflects as far as the given page on the Internet is significant. Gugl believes, that when one page refers to another, she as if « gives the voice » for other page. Then, the more voices it is given for page, the be more important this page should. Besides - and it is important! - « given voices » differ on the importance depending on the one "who" votes. Gugl counts up importance of estimated page, proceeding from the "voices" given for it{her}. Thus during manufacture of calculations Gugl takes into account, as far as each of given "voices" is important (weight).
Thus, PehjdzhRank Gugla is his own way of definition of importance of estimated page. It is rather important, because PehjdzhRank is one of the factors determining the order of a conclusion of results of search. It not the unique factor which Gugl uses for a rating of pages, but one of the major.
From this time, we shall use term "PehjdzhRank" in the reduced form as "PR".
Notes:
It is far from being all links are taken into account Guglom. So, Gugl rigidly filters the links available on known « farms of links » (specially created sets of webs - documents, it is artificial created for increase in "weight" of those or other webs - resources). Some links even result in "punishment" of page on which they conduct, from party Gugla. Understandably, that the web designer cannot supervise, what sites refer to their sites, but they should understand, they put down what links on other sites. For this reason, links, prostavlennye inside one separately taken site, cannot do much harm to him whereas the links conducting{leading} outside of a site, can be "harmful" if they conduct on the "punished" sites. Therefore be cautious, when put links to external resources. If PR a site makes 0 it usually follows as a result of punishment, and it will be short-sighted to put down the link to such site.
Arrangement of internal links
The fact: the Website has maximal value PehjdzhRanka which is distributed on his pages with the help of internal links.
Maximal value PehjdzhRanka of a site is equivalent to quantity{amount} of pages on a site, increased on unit. It increases links entering from the outside from other sites and is reduced by links leaving outside to other sites. Now we speak about value PehjdzhRanka for all site and we do not touch PehjdzhRank each individual page. You should not take on my reasons belief, you and can come besides to the conclusion, having taken a pencil and a sheet of a paper, and having made small calculations.
The fact: Maximal value PehjdzhRanka of a site the above, than is more quantity{amount} of pages on this site.
The more pages has a site, the above it PehjdzhRank. And again - you can come to the same conclusion with a pencil and a sheet of a paper. Thus remember, that in attention those pages about which existence Gugl knows undertake only.
The fact: Illiterate arrangement of internal links conducts to decrease{reduction} PehjdzhRanka of a site, but supercompetent arrangement of internal links is not capable to raise{increase} it .
Bad production of internal links reduces PehjdzhRank a site, but there is no way to raise{increase} PehjdzhRank with the help of internal links. The unique way of increase PehjdzhRanka is a reception of the greater number of links entering from the outside and-or increase in quantity{amount} of pages at a site.
Caution: Though I strongly recommend to create new pages and to add them on a site, nevertheless, there are certain kinds of pages which to create and add categorically it is impossible. These are the pages in full or in part getting under definition "cookie-cutters" (« obrezchiki kukov »). Gugl distinguishes them as a spam that includes his internal system of alarm not only in relation to these pages, but also to a site as a whole. And all comes to an end "punishment" of a site as a whole. New pages should contain only a qualitative content is the basic and major requirement.
What shall we do{make} with this "general" PehjdzhRankom?
Now we shall consider some examples of calculations to understand, how it is possible to manipulate PehjdzhRankom a site. However, before to make it, it is necessary to pay attention to that fact, that the web - page is included in index Gugla only when there is even one other page on the Internet which refers to it{her}. So declares itself Gugl. If the page no in index Gugla any links from it{her} are not taken into account by manufacture of calculations.
Actually, we can neglect this fact, basically because other documents on a subject « Explanation PehjdzhRanka » also neglect him . So, this calculator works in two modes: "simple" and "real". In a "simple" mode it is meant, that calculations are made for pages, all from which are in index Gugla, without dependence from, whether any other pages refer to them. In a "real" mode calculations for the pages which are not taking place in index Gugla, are not considered. The examples following below concern to the results received in a "simple" mode.
Let's imagine a site consisting of three pages (page A, B and C), on which not prostavleny links from the outside this site. We shall appropriate{give} to each page primary value PehjdzhRanka in 1 though, actually, never mind, from what value we shall start - with 1, with 0 or with 99. Even if to appoint this figure in some millions, after lines of consecutive computing iterations the end result will be same. Simply, starting with 1, we need smaller quantity{amount} of iterations, rather than reckoning with 0 or any other value. You can watch{keep up} calculations with the help of a pencil and a paper, or to use the calculator.
Maximal PehjdzhRank a site is quantity{amount} PehjdzhRanka inside a site. We have three pages, means, maximal PehjdzhRank for him is equaled 3.
By the current moment, on one of pages there is no link to any another, and any other pages do not refer to these three. If you will unitary make calculations for each page, you receive value PehjdzhRanka for each of them, equal 0.15. completely never mind, you will pass what quantity{amount} of computing iterations - PehjdzhRank each page will remain equal 0.15. The general{common} PehjdzhRank a site will make 0.45. though in an ideal can be equaled 3. The site in the most serious image loses the most part potentially possible{probable} PehjdzhRanka.
Example 1
Now we shall start over again from each page by which it is appropriated{given} PR 1. We shall put the link from page A on page B and we shall make calculations again for each of pages. That we shall receive:
Page A = 0.15
Page B = 1
Page C = 0.15
Page A "has voted" for page B and, in result, PehjdzhRank pages B has increased. It is not bad looked for page B, but only in the first iteration - we in fact have not taken into account the situation described above from "Dodge - 22". And now we shall see, as figures after a lot of computing iterations will change.
After 100 iterations we have:
Page A = 0.15
Page B = 0.2775
Page C = 0.15
This result remains quite good for page B, but any more so good what he was earlier. The received results now look is more realistic. Thus, the general{common} PehjdzhRank a site now makes 0.5775, that it is little bit better, but nevertheless only a small part of that value which can take place.
The note:
From the technical point of view, these results are incorrect in connection with specific attitude{relation} Gugla to so-called « dangling links » (to " hanging down links »), but they can be used as an example of calculations.
Example 2
Let's try other structure of links. We shall place on each of pages of the link to all staying pages. Again we shall appropriate{give} each of pages PR, equal 1:
Page A = 1
Page B = 1
Page C = 1
Now we have reached{achieved} a maximum. Never mind, how much computing iterations will be made, - for each page PR will make 1. We shall receive the same results at creation of cyclic reference structure (that is when A refers on B, B refers on C, and C refers on D). See, as it looks on the calculator.
The result received by us testifies, that, due to bad structure of links, it is very easy to lose PehjdzhRank whereas at reasonable prostanovke links we can reach{achieve} his greatest possible size. But we do not set as to ourselves the purpose to reach{achieve} a situation when each page on a site will have identical share PehjdzhRanka. We wish, that one or several pages had big share PehjdzhRanka at the expense of other pages. We carry index page, the central semantic pages to such pages (« hub pages ») and pages which are optimized under the certain search searches. Now we have only three pages, therefore we increase PehjdzhRank index page - pages A. It fine illustrates idea of redistribution PehjdzhRanka.
Example 3
Now we shall try to act{arrive} as follows. We shall place on page A of the link on B and C. Also on pages B and C we shall place the link to page A. We shall begin calculations with value PR equal 1 for each pages. After the first iteration it is received:
Page A = 1.85
Page B = 0.575
Page C = 0.575
And after 100 iterations the result is transformed in:
Page A = 1.459459
Page B = 0.7702703
Page C = 0.7702703
In both cases, general meaning PehjdzhRanka of a site makes 3 (it is a maximum), that is is lost nothing. Besides in both cases it is evidently visible, that page A has much more share PehjdzhRanka, than two other pages. So occurs because pages B and C pass shares PehjdzhRanka only to page A and any other pages. Differently, we have received the controlled mechanism of transfer of share PehjdzhRanka in that area of a site in what we want.
Example 4
In summary, we shall save previous reference structure, and we shall add the link from page C on page B. Again we shall start with PR, equal 1 for all pages. After the first iteration we shall receive:
Page A = 1.425
Page B = 1
Page C = 0.575
In comparison with results of the first iteration from the previous example, page A has lost some share PehjdzhRanka, page B has a little got, and page C has remained at the same level. Page C now divides "voices" between pages A and B. Earlier page A received all "voices". For this reason page A has lost, and page B - has got. By results of 100 computing iterations it is received:
Page A = 1.298245
Page B = 0.9999999
Page C = 0.7017543
When the dust at last settles, page C has lost a little in the PehjdzhRanke as, dividing now "voice" between A iB, instead of giving them all on A, page A gives page C through the link with A on C. Thus, addition of the additional link leaving outside from page causes loss of part PehjdzhRanka of this page by indirect image if any of pages on which the link is put, returns the link back. If pages on which prostavleny links, do not return the link back losses PehjdzhRanka of page do not occur. If to imagine more vital situation when the link comes back in the indirect image (page another refers to other page, - on a third, and so on while N-naja the page will not return the link to the first) losses PehjdzhRanka of the first page are insignificant. It not so is important, if the question is internal links to a site, but gets special value when links conduct outside a site.
Example 5: new pages
Addition of new pages on a site represents the important mechanism of increase of the general{common} PehjdzhRanka a site as each new page adds on the average PR 1 to a general meaning. When we are engaged in addition of new pages, their new PehjdzhRank can be passed already existing important pages. We shall use the calculator for demonstration.
Let's add three new pages to the structure described by us in an example 3 we [look]. So, there are three new pages, but they while especially do not influence a situation. Small increase in the general{common} PehjdzhRanka, and till 0.15 on new page - that we see all this. And now let's put down from them links to a site.
Let's put links from each of new pages on the important page, in our case - on page A we [look]. Thus we see, that total PehjdzhRank was doubled, with 3 (when there were no new pages) up to 6. Besides and PehjdzhRank pages A also it was practically doubled.
The unique thing is wrong in our model. New pages are "orphans". They cannot get in index Gugla and consequently cannot add any PehjdzhRanka to a site, and cannot pass any share PehjdzhRanka to page A. Each of them requires receiving the link even from one of other pages. If page A is important page the best page for accommodation of such links, it, certainly, page A we [look]. You can have a good time as much as for a long time selection of variants of arrangement of links, but, from "point of view" of page A, she does not count herself the best place for accommodation of links.
Thus, production of links from one page on a plenty of pages in case you get{start} at once many new pages, is not good idea. In this case you receive dispersion PehjdzhRanka of this important page. The probability is high, that on a site is present more than one important page, therefore it is possible to use prostanovku direct and return links between the important and new pages. You can use the calculator to try some various mini-models of a site to find the best accommodation of links which provides the best results from the point of view of level PehjdzhRanka for the important pages.
The conclusion by examples
You evidently see, that, due to the organization of internal reference structure of a site, it is possible to provide transfer PehjdzhRanka to his separate pages. Internal pages of a site should be created in view of redistribution PehjdzhRanka, but it works only in that case when Gugl knows about their existence. Therefore it is necessary to build politics so that robots Gugla in due time indexed them.
Entering and leaving links
It is possible to give the certain examples, but it is much better to esteem about them below, and it is a little to be indulged with models, besides using calculator already familiar to us.
Questions
When one page contains set of links to other page, whether all links are taken into account?
Differently, if page A unitary refers to page B and 3 times on page C, whether page C of 3/4 shares divided PehjdzhRanka from page A receives?
Concept PehjdzhRanka consists that the page "votes" for one or more other pages. In the original document from Gugla, describing PehjdzhRank, it is spoken nothing about "voting" more than one link for one page. Such idea undermines concept PehjdzhRanka, and quite definitely if to admit{allow}, that she is fair, opens open space for manipulations in the field of change of proportions of transfer of "voices" for lines of pages. Kohl soon the link on not the important page is necessary for you, add from it{her} some links to the important page for minimization of negative effect.
As we did not manage to receive from Gugla the certain answer to this subject, it is reasonable to assume, that the page can pass other page only one "voice", and that the additional "voices" proceeding from one page, are not taken into account.
When the page refers to itself, whether such link is taken into account?
Let's return again to the basic concept. She consists that the page can "vote" for other pages. In the original document from Gugla it is said nothing that pages can give "voices" for themselves. Therefore such idea contradicts the concept and, besides, opens open space for unfair manipulations with results. For these reasons, it is reasonable to count, that the page cannot vote for itself, and that such links are not taken into account.
« Hanging down links represent such links which conduct on page from which there is no leaving link. They bring damage of model as it is not clear how their weight is redistributed. And such links - great variety. Often these hanging down links conduct on pages which we never before did not load. As hanging down links do not influence rating PehjdzhRanka of other pages in the direct image, we simply delete them from system until all calculations PehjdzhRanka will not be made. When calculations are completed, all sizes PehjdzhRanka are known, these links are again added in base and do not influence any more the order of things significally », - so the endurance{quotation} from the original document about PehjdzhRanke, written by founders Gugla Sergey Brin and Lawrence Pejdzhem sounds.
So, the hanging down link is the link conducting{leading} on page which has no links leaving from it{her}, or the link to page which Gugl does not index. In both cases, Gugl deletes such link from base right after the beginnings of process of calculations PehjdzhRanka, and returns her shortly before calculation comes to an end. Then influence of such links on results of calculation PehjdzhRanka is minimal.
Probably, with a view of increase of functionality of a concrete site, it is possible to put down links to pages which have no target links, and to do{make} it lost-free PehjdzhRanka, but it is dangerous from the point of view of decrease{reduction} potential PehjdzhRanka. Potential value for this site makes 5 as he contains 5 pages, but without involving page E, the site reaches{achieves} only value 4.15.
And now we shall put down the link from page A on page E and we shall press Calculate. We shall note, that total value is reduced rather authentically. However, as the new link is hanging down, and will be removed from calculations, we can neglect new total value and consider the previous 4.15 truth. Influence of hanging down links useful from the point of view of functionality is those. They do not entail loss total PehjdzhRanka.
However, something, nevertheless, is lost, therefore we shall put the link from page E back on page A and we shall press Calculate. Now we have maximal value PehjdzhRanka which is possible for 5 pages. It is lost nothing.
In spite of the fact that from the point of view of convenience funkcionala it is quite good to put links to pages inside a site without their return, it is dangerous from the point of view of falling PehjdzhRanka. For this reason always watch{keep up} that that each page inside a site referred at least to one page within the limits of the same site.
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