Ranking algorithm are composed of the methods by which search engines calculate and rank websites' position in the listing results. Ranking algorithms can be influenced by all kinds of factors including domain name, page content, site submission , Html code and link popularity .
Google's ranking algorithm are always studied by many webmasters and experts who want to find out how it works and take advantage of it in SEO.
This is due to its complex text matching algorithm and of course the PagerankT system that this engine uses. More on the PagerankT system later. Google is popular with webmasters and Internet marketing companies also attribute to the highly workable ranking system it uses .
There are two main parts to the algorithm Google uses, the first is its text matching system whereby Google tries to find pages relevant to what the searcher has entered in the search box. The second and equally important part of the algorithm is the Google patented PagerankT system.
Speaking of first part, Google gives a lot of "weight" to the title tag when searching for keywords.Therefore, It is vital to make sure your most important keywords or keyphrases appear within this tag. It seems to work best if you've put other words in your title tag too after your keywords, but try to remain under 20-30 characters .Maybe,
many of you know this already. But Google does not use meta tags such as the keywords meta tag or the description meta tag. This is because the text within these tags can't be seen by visitors to a website. Therefore Google feels these tags will be abused by webmasters placing lots of unrelated words in them in order to get high traffic.
This lack of support for meta tags means that Google creates your description from the first few lines of text on your page. This in turn means that you've to have your keywords and phrases right at the top of your web pages, if Google finds them your page becomes more relevant, if however it doesn't find them the rest of your page has to work harder to become relevant. To see an example of what I mean scroll back to the top of this page and you'll notice keywords like: Google submitting tips, ranking high at google.com, Google ranking tips, pagerank algorithm, Google algorithm guide.
The above text includes keywords and keyphrases related to the theme of this page. Now when people search for any of those keywords or keyphrases this page is much more likely to be listed near the top of the results than a page that doesn't imply this technique
Speaking of second part,
Pagerank is as the name suggests a ranking system of pages. It works on the basis that if a website AAA.COM has been linked from a website BBB.COM, AAA.COM must have some good content and therefore Google will count the link from BBB.COM as a vote for AAA.COM. You can check your Pagerank on Google by downloading the Google toolbar from
The PagerankT scale goes from 1 to 10 on the Google toolbar and from 1 to 7 beside listings in the Google directory. A less important site is of course a site with a PR of 1 and a very very important site is a site with a PR of 7 or 10, in the directory or toolbar respectively.
The more links or votes a site has the more important it must be and therefore the higher it will rank for search words which it is relevant to, right?The answer is "wrong".
Google does not simply count the number of inbounds links a page has.
Google Pagerank system also takes into account the number of links the page that has linked to you has. The reasoning for this is that a page A has a certain amount of voting PR, if your site Y is the only link from that page X, then Google feels confident that page A thinks your page B is the best link it has and will give you more PR. If however page A has 50 links, page B could think your only the 50th best link. Hence the more links a page has, the less of a PR value your site will obtain.
linking to a site with a more than six (PR=6) will provide a significant boost to your PR in most cases, but in some cases where the site also links with 100 other sites the boost will be almost zero. Likewise if a site has a PR of just 2 but you and only one other site are linked from it, then the PR boost would be more than the site with 100 links and a PR of 6.
Google Pagerank formula
PR(A) = (1-d) + d(PR(t1)/C(t1) + ... + PR(tn)/C(tn))