Google PageRank Loss Example -
Poor Internal Linking of Webpages
This example shows how poor internal linking will cause PageRank loss. PageRank loss simply means that the Total PageRank achieved is not equal to the Maximum PageRank available of a website.
Tips:
Maximum PageRank Available = Total Number of Pages x 1
For example: if your web site has 85 pages, the Maximum PageRank Available for your web site is 85. Then you can decide how to allocate the 85 PageRank value to the pages.
Let's get started!
Linking Structures of Web Pages
The linking structure of this kind of web site is shown as the following diagram. Please note that the link from Page 2 to Page 3 is a Dangling Link.
PageRank Numbers of All Pages at the Beginning:
Same as previous examples, all pages have a PageRank PR 1 at the beginning. Fill in the PageRank numbers of all pages in a table as shown below:
| 1 | |||||||
| Home | 1.00 | ||||||
| Page 1 | 1.00 | ||||||
| Page 2 | 1.00 | ||||||
| Page 3 | 1.00 | ||||||
Total PR: |
4.00 | ||||||
PR Loss: |
0 |
Start Calculation PageRanks from Home Page:
Same as the first example, let's start with the home page. Since this is the first calculation, the PR value of all pages will be counted as one.
Fill in the result in the table:
| 1 | 2 | ||||||
| Home | 1.00 | 0.58 | |||||
| Page 1 | 1.00 | ||||||
| Page 2 | 1.00 | ||||||
| Page 3 | 1.00 | ||||||
Total PR: |
4.00 | ||||||
PR Loss: |
0 |
Calculate New PageRank Number for Page 1:
As you noticed that Page 1 has only Backlink from Homepage. The calculation is shown as below:
Again, fill in the new PageRank number of Page 1 in the table as shown below:
| 1 | 2 | ||||||
| Home | 1.00 | 0.58 | |||||
| Page 1 | 1.00 | 1.00 | |||||
| Page 2 | 1.00 | ||||||
| Page 3 | 1.00 | ||||||
Total PR: |
4.00 | ||||||
PR Loss: |
0 |
Calculate New PageRank Number for Page 2:
Page 2 has only a Backlink from Page 1. The PageRank calculation of Page 2 is shown as below:
The results will become:
| 1 | 2 | ||||||
| Home | 1.00 | 0.58 | |||||
| Page 1 | 1.00 | 1.00 | |||||
| Page 2 | 1.00 | 0.58 | |||||
| Page 3 | 1.00 | ||||||
Total PR: |
4.00 | ||||||
PR Loss: |
0 |
Calculate New PageRank Number for Page 3:
Page 3 has only a backlink from Page 2.
Note:
This link is a Dangling Link. Therefore in reality this link will not be considered.
PageRank Results After First Round of Calculation:
After first round of PageRank calculation, the new PageRank numbers of all pages are shown in the following table:
| 1 | 2 | ||||||
| Home | 1.00 | 0.58 | |||||
| Page 1 | 1.00 | 1.00 | |||||
| Page 2 | 1.00 | 0.58 | |||||
| Page 3 | 1.00 | 1.00 | |||||
Total PR: |
4.00 | 3.15 | |||||
PR Loss: |
0 | 0.85 |
Repeat doing the Google PageRank Calculation:
Now repeat doing the calculations using the same method as before and you will get the following results:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | |
| Home | 1.00 | 0.58 | 0.58 | 0.42 | 0.42 | 0.37 | 0.37 |
| Page 1 | 1.00 | 1.00 | 0.64 | 0.64 | 0.51 | 0.51 | 0.46 |
| Page 2 | 1.00 | 0.58 | 0.58 | 0.42 | 0.42 | 0.37 | 0.37 |
| Page 3 | 1.00 | 1.00 | 0.64 | 0.64 | 0.51 | 0.51 | 0.46 |
Total PR: |
4.00 | 3.15 | 2.43 | 2.12 | 1.86 | 1.75 | 1.65 |
PR Loss: |
0 | 0.85 | 1.57 | 1.88 | 2.14 | 2.25 | 2.35 |
| 8 | 9 | 10 | 11 | 12 | 13 | 14 | |
| Home | 0.35 | 0.35 | 0.34 | 0.34 | 0.34 | 0.34 | 0.34 |
| Page 1 | 0.46 | 0.44 | 0.44 | 0.44 | 0.44 | 0.44 | 0.44 |
| Page 2 | 0.35 | 0.35 | 0.34 | 0.34 | 0.34 | 0.34 | 0.34 |
| Page 3 | 0.46 | 0.44 | 0.44 | 0.44 | 0.44 | 0.44 | 0.44 |
Total PR: |
1.61 | 1.58 | 1.57 | 1.55 | 1.55 | 1.54 | 1.54 |
PR Loss: |
2.39 | 2.42 | 2.43 | 2.45 | 2.45 | 2.46 | 2.46 |
| 15 | 16 | 17 | 18 | 19 | 20 | ||
| Home | 0.34 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | |
| Page 1 | 0.43 | 0.43 | 0.43 | 0.43 | 0.43 | 0.43 | |
| Page 2 | 0.34 | 0.33 | 0.33 | 0.33 | 0.33 | 0.33 | |
| Page 3 | 0.43 | 0.43 | 0.43 | 0.43 | 0.43 | 0.43 | |
Total PR: |
1.54 | 1.54 | 1.54 | 1.54 | 1.54 | 1.54 | |
PR Loss: |
2.46 | 2.46 | 2.46 | 2.46 | 2.46 | 2.46 |
Results of PageRank Calculation:
The PageRank numbers of all pages go to stable only after 16 round of repeat doing calculations. The results are shown in the following diagram:
Conclusion of PageRank Loss by Poor Internal Linking:
By improper internal linking of web pages, total PageRank of a website can be lossed. This kind of links must be avoid.
Page Rank Increase Tips:
The Maximum PageRank of a web site can be increased by adding more pages. This can possibly increase the PageRank of some important pages (e.g Home Page) if link properly.
This page discuss how Google PageRank loss happens in poor internal linking of webpages.
