Be independent, be your own financial planner
 
Search our Website:
Go to Bottom
 
  1. Monetizing Social Media : Find out how social media can also be a great money making tool.
 
  1. Pure Money Making tools : Here we are composing tools to help you manage, optimize and guide your internet marketing strategies!
  2. SEO Forum : Use our open forum. You can use this as an opportunity to share your links and make profits!

Dangling links

Dangling linksAn important aspect of outbound links is the lack of them on web pages, and the relationship between ddangling links and page rank. When a web page has no outbound links, its PageRank cannot be distributed to other pages. Lawrence Page and Sergey Brin characterise links to those pages as dangling links.

The effect of dangling links shall be illustrated by a small example website. We take a look at a site consisting of three pages A, B and C. In our example, the pages A and B link to each other. Additionally, page A links to page C. Page C itself has no outbound links to other pages. At the damping factor of 0.75, we get the following equations for the single pages' PageRank values:

PR(A) = 0.25 + 0.75 PR(B)
PR(B) = 0.25 + 0.375 PR(A)
PR(C) = 0.25 + 0.375 PR(A)

Solving the equations gives us the following PageRank values:


Polls
PR(A) = 14/23
PR(B) = 11/23
PR(C) = 11/23

Dangling links and page rankSo, the accumulated PageRank of all three pages is 36/23 which is just over half the value that we could have expected if page A had links to one of the other pages. According to Page and Brin, the number of dangling links in Google's index is fairly high. A reason therefore is that many linked pages are not indexed by Google, for example because indexing is disallowed by a robots.txt file.

Additionally, Google meanwhile indexes several file types and not HTML only. PDF or Word files do not really have outbound links and, hence, dangling links could have major impacts on Page ranking algorithm. I wouldn't worry about your PR, its not a ranking factor and so thinking about it so much is not needed. For example, have a look at some pdf sharing sites and you will see those work just fine and link to many pdf's. I wouldn't advice blocking google from the pdf's because that will cut down the amount of pages and content your site has, so no I wouldn't nofollow them nor place them in the robots file personally.


In order to prevent PageRank from the negative effects of dangling links, pages wihout outbound links have to be removed from the database until the PageRank values are computed. According to Page and Brin, the number of outbound links on pages with dangling links is thereby normalised. As shown in our illustration, removing one page can cause new dangling links and, hence, removing pages has to be an iterative process. After the PageRank calculation is finished, PageRank can be assigned to the formerly removed pages based on the PageRank algorithm. Therefore, as many iterations are needed as for removing the pages. Regarding our illustration, page C could be processed before page B. At that point, page B has no PageRank yet and, so, page C will not receive any either. Then, page B receives PageRank from page A and during the second iteration, also page C gets its PageRank.

Regarding our example website for dangling links, removing page C from the database results in page A and B each having a PageRank of 1. After the calculations, page C is assigned a PageRank of 0.25 + 0.375 PR(A) = 0.625. So, the accumulated PageRank does not equal the number of pages, but at least all pages which have outbound links are not harmed from the dangling links and page rank problem.

By removing dangling links from the database, they do not have any negative effects on the PageRank of the rest of the web. Since PDF files are dangling links, links to PDF files do not diminish the PageRank of the linking page or site. So, PDF files can be a good means of search engine optimisation for Google.

SEO tips and tricks

SEO terms

  1. Press releases and SEO
    Many companies don't take advantage of the combined benefits of press releases and SEO. They don't understand that press releases can be part of your SEO efforts
  2. Who to submit a press release to?
  3. How to write press release?
  4. Split testing
    Split testing is a way of testing two different sales messages to find the most effective one.
  5. Image optimization SEO
  6. Typos for SEO
    If you don't use typos for SEO in your website you could be losing out on traffic that is legitimately looking for your business.
  7. Link building and page rank
  8. Increase traffic by link building
  9. Tips for keyword optimization
  10. Page rank for small business
    Page Ranking algorithm tends to privilege small businesses. Find out how...
  1. Split testing techniques
  2. Simple A-B split testing
  3. Multi variate split testing
  4. Dangling links
    An important aspect of outbound links is the lack of them on web pages, and the relationship between dangling links and page rank.
  5. Long tail keywords
  6. Page ranking algorithm
  7. PR using outbound links
  8. What is PR0?
  9. Post penguin SEO
    It was the technical SEOs that has been abusing the algorithm, and where their knowledge and experience is needed on the good side of post penguin SEO.
  10. The damping factor
    PageRank theory assumes, an imaginary surfer who is randomly clicking links will at some stage desist from clicking. The probability, the person will continue is the damping factor d.
Content updates

Email Notification

Share on APSense

Seed Newsvine

Pure Money Making tools

Marketing / SEO   Business Blogs
Blogarama - Blog Directory   Top Small-Business Sites
  bookmark at folkd
Increase Page Rank   Wutzle - Blog DirectoryWutzle - Blog DirectoryMy Blog Rating
My Zimbio   Top Blogs
laksamana786

Newest Posts

Pure Money Making community

 
You are here :
Home » Search Engine Optimization » SEO tips and tricks » SEO terms » Dangling links
Bookmark this topic :
Bookmark and Share
 
 
Subscribe to our Content Pure Money Making updates Subscribe to our Community Financial information sites Internet business services Websites of the future

Join Traiborg

 
 
 
 
 
Go to top
 
Home  |  About Us  |  Contact Us  |  Links  |  Submit Your Site  |  Exchange Link  |  Sitemap  |  XML Sitemap  |  Toolbar Copyright © 2009-2014 Pure Money Making.net.
All Rights Reserved.