Page Rank Theory :- It is the method of google to determine the relevancy and importance of the page. And it ranges from 0 to 10. 0 is the lowest page rank and 10 is the highest. It is based on incoming links.
[Perfect search engine optimization]
[Perfect search engine optimization]
Page rank equation to calculate PR
PR(A) = (1-d) + d(PR(t1)/C(t1) + … + PR(tn)/C(tn))
How page rank works ?
“That’s the equation that calculates a page’s PageRank. In the equation ‘t1 – tn’ are pages linking to page A, ‘C’ is the number of outbound links that a page has and ‘d’ is a damping factor, usually set to 0.85.”
“That’s the equation that calculates a page’s PageRank. In the equation ‘t1 – tn’ are pages linking to page A, ‘C’ is the number of outbound links that a page has and ‘d’ is a damping factor, usually set to 0.85.”
Some things to remember about page rank
1/ Not all links weight the same
Example :- If you had a web page with a PR8 and had 1 link on it, the site linked to would get a fair amount of PR value. But, if you had 100 links on that page, each individual link would only get a fraction of the value.
2/ Content is not taken into account when PageRank is calculated.
3/ PageRank does not rank web sites as a whole, but is determined for each page individually.
4/ Each inbound link is important to the overall total. Except banned sites, which don’t count.
5/ PageRank values don’t range from 0 to 10. PageRank is a floating-point number. “It’s more accurate to think of it as a floating-point number.
6/ “Google tries to find pages that are both reputable and relevant. If two pages appear to have roughly the same amount of information matching a given query, we’ll usually try to pick the page that more trusted websites have chosen to link to.
7/ Anchor text is important. The more specific is the reference, the better Google can evaluate it and consider it in relates search queries.
8/ Headers (h1, … ,h6), strong tags and semantic contentare important. (Update: But it doesn’t improve PageRank.) “Place it in the description and meta tags, place it in bold/strong tags, but keep your content readable and useful. Be aware of the text surrounding your keywords, search engines will become more semantic in the coming years so context is important.”
7/ Anchor text is important. The more specific is the reference, the better Google can evaluate it and consider it in relates search queries.
8/ Headers (h1, … ,h6), strong tags and semantic contentare important. (Update: But it doesn’t improve PageRank.) “Place it in the description and meta tags, place it in bold/strong tags, but keep your content readable and useful. Be aware of the text surrounding your keywords, search engines will become more semantic in the coming years so context is important.”
Some facts about google page rank :-
- Frequent content updates don’t improve Page Rank automatically. Content is not part of the PR calculation.
- High Page Rank doesn’t mean high search ranking.
- DMOZ and Yahoo! Listings don’t improve Page Rank automatically.
- .edu and .gov-sites don’t improve Page Rank automatically.
- Google considers site age, backlink relevancy and backlink duration. PageRank doesn't. If backlink isn't relevant, it won't weight much.
- Sub-directories don’t necessarily have a lower Page Rank than root-directories.
- Wikipedia links don’t improve PageRank automatically (update: but pages which extract information from Wikipedia might improve PageRank).
- Meta-Tags don’t improve PageRank.
- Links marked with nofollow-attribute don’t contribute to Google PageRank.
- Efficient internal onsite linking has an impact on PageRank.
- Related high ranked web-sites count stronger. But: “a page with high PageRank may actually pass you less if it has more links, because it’s spread too thin.”
- Links from and to high quality related sites have an impact on Page Rank.
- Multiple votes to one link from the same page cost as much as a single vote.
- Bad incoming links don’t have impact on Page Rank.
- Crawlers don’t analyze web-sites permanently. “It often takes two full monthly updates for all of your incoming links to be discovered, counted, calculated and displayed as backlinks.”
- Links don’t give PR away, they are votes. “When a page votes its PageRank value to other pages, its own PageRank is not reduced by the value that it is voting.
- Links from one page to itself don’t improve Page Rank.
- Adding new pages can decrease Page Rank.
- Each inbound link is important to the overall total. Except banned sites.
- Links from and to high quality related sites are important.:- “The more closely related the pages, the higher the PageRank amount transferred.” “Linking to high quality sites shows the search engines your site is very useful to your visitors. Unless your site has been around for years and is well established and trusted by Google, this factor will have an adverse effect on your site’s overall ranking. Linking only to high quality content sites will give your site an edge over your competition.”
- Incoming Links from popular sites are important.
- Site can be banned if it links to banned sites. “Be extremely careful of any out-going links from your site. Don’t link to bad neighborhoods (link farms, banned sites, etc.) Google will penalize you for bad links so always check the PageRank of the sites you’re linking to from your site.”
- Illegal activities will penalize your PageRank and possibly ban your site from Google. “Hidden text, deceptive redirects, cloaking, automated link exchanges, or anything else against Google’s quality guidelines” can ban your site from Google.
- Related high ranked web-sites count stronger (or don’t they?). “One-way inbound links from websites with topics that are related to your website’s topic will help you gain a higher Page Rank.” Other one-way inbound links from pages with high page rank but unrelated topics do help a little, but not nearly as much.
- Dangling links don’t have impact on Page Rank. “Dangling links are simply links that point to any page with no outgoing links.
Google page rank tools
- Webmastereyes, Visual PageRank View
The results will show the page given along with the PageRank of each link on that page. You also have the option to show “nofollow” and external links. - Google PageRank Prediction
The tool analyzes the popularity of a given web-site and tries to predict its future Google PageRank. More Page Rank Tools. - Google Ranking Factors
Alleged positive and negative SEO Google Ranking Factors
- Google Quality Guidelines
These quality guidelines cover the most common forms of deceptive or manipulative behavior, but Google may respond negatively to other misleading practices not listed here (e.g. tricking users by registering misspellings of well-known websites). - Check if your site is in Google database
- Reinclusion request form
Request reinclusion of a site that has violated the webmaster guidelines - Google Tools
A comprehensive overview on Dmoz.org.