The document discusses search optimization with a focus on the PageRank algorithm, its history, and its applications in various search engines. It covers how PageRank is calculated, including factors like inbound and outbound links, and its advantages and limitations. The document concludes by emphasizing the significance of optimization for webmasters and its impact on the web development industry.

1. Introduction
Search Optimization
Pagerank
Conclusion
Search Optimization Technique : PageRank
Gohil Dhara

2. Introduction General outline
Search Optimization History
Pagerank
Conclusion
History
What is Search Optimization
PageRank (Two different notations)
Effects of the Links
How is PageRank Calculated
Advantages and Limitations

3. Introduction General outline
Search Optimization History
Pagerank
Conclusion
Seeds of Search Optimization
Pagerank
Citations analysis, HITS, Hyper Search
Vannevar Bush Gerard Salton Sergei Brin Larry Page

4. Introduction
Search Optimization What is Search optimization
Pagerank Optimization in various Search Engines
Conclusion
The old Approach
Meaning of Search Optimization
It’s a backend Process
Relevancy of the keywords
Link Analysis
Age of a webpage

5. Introduction
Search Optimization What is Search optimization
Pagerank Optimization in various Search Engines
Conclusion
Reciprocal links
Commercial links Natural links
Natural citations Old sites
Content filters
Link Quality-crawl depth
Natural/artificial links
Relevancy algorithms poor Topical community
Biased towards commercial result
Reciprocal links
Page content

6. Introduction Understanding PageRank ( How it works 1 )
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
A social example
Teacher A
Principal Student A
Student B
Teacher B
Student C

7. Introduction Understanding PageRank ( How it works 2 )
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion

8. Introduction Understanding PageRank ( Algorithm )
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
PR (A) = (1-d) + d (PR (T1) / C (T1) + ... + PR (Tn) / C (Tn))
Where,
PR(A) is the PageRank of page A
PR(Ti) is the PageRank of pages Ti which link to page A
C(Ti) is the number of outbound links on page Ti and
d is a damping factor which can be set between 0 and 1
In simple terms,
PageRank for a given page = Initial PageRank + (total ranking power ÷
number of outbound links) +...
The second version,
PR (A) = (1-d) + d (PR (T1) / C (T1) + ... + PR (Tn) / C
(Tn))
N

9. Introduction Understanding PageRank ( Damping factor )
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
The random surfer model
Damping Factor d
Minimum PageRank ( 1-d )
Link 1
Maximum PageRank N+( 1-d )
Link 2
Link 1 Link 3
. .
. .
Link n d
Link n

10. Introduction Understanding PageRank ( Computation of PageRank )
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
Consider an imaginary web of 3 web
pages.
And the inbound and outbound link
structure is as shown in the figure. The
calculations can be done by following
method :
PR(A) = 0.5 + 0.5 PR(C) PR(B) = 0.5 + 0.5 (PR(A) / 2) PR(C) = 0.5 + 0.5 ((PR(A) / 2 )+ PR (B))
= 0.5 + (0.5*1)
=1 = 0.5 + 0.5 (1/2) = 0.5 + 0.5 (1/2 + 0.75)
= 0.5 + (0.5 * 0.5) = 0.5 + 0.5 (1.25)
= 0.5 + 0.25 = 0.5 + 0.625
= 0.75 = 1.125

11. Introduction Understanding PageRank ( Iterative)
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
Iteration PR(A) PR(B) PR(C)
0 1 1 1
1 1 0.75 1.125
2 1.0625 0.765625 1.1484375
3 1.07421875 0.76855469 1.15283203
4 1.07641602 0.76910400 1.15365601
5 1.07682800 0.76920700 1.15381050
6 1.07690525 0.76922631 1.15383947
7 1.07691973 0.76922993 1.15384490
8 1.07692245 0.76923061 1.15384592
9 1.07692296 0.76923074 1.15384611
10 1.07692305 0.76923076 1.15384615
11 1.07692307 0.76923077 1.15384615
12 1.07692308 0.76923077 1.15384615

12. Introduction Understanding PageRank ( Effect of inbound links 1 )
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
External Site A
0.22
About
0.41
Home
External Site B
0.92 0.22
Home Product
0.92 0.41
External Site C
0.22
Links
0.41
Home
External Site A
0.92 0.22
Average PR = 0.378

13. Introduction Understanding PageRank ( Effect of inbound links 2 )
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
External Site A
0.34
About
1.1
Home
External Site B
0.92 0.34
Home Product
3.35 1.1
External Site C
0.34
Links
1.1
Home
External Site A
0.92 0.34
Average PR = 3.35

14. Introduction Understanding PageRank ( Effect of outbound links )
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
External Site A
0.23
About
0.84
External Site B
0.23
Home Product
2.44 0.84
External Site C
0.23
Links
0.84
External Site A
0.23
Review A Review B Review C Review D
0.23 0.23 0.23 0.23

15. Introduction Understanding PageRank
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
SERP Rank
Google Toolbar(The intentional surfer model)
Ecosystem
Academic doctoral programs
ISI impact factor(Institute for scientific information)
Wikipedia

16. Introduction Understanding PageRank
Search Optimization Applications
Pagerank Advantages and Limitations
Conclusion
Advantages Limitations
Most relevant search results Bias towards older pages
Reduces spamdexing Link trade
Values Natural Links

17. Introduction
Search Optimization
Pagerank
Conclusion
Optimization is necessary
PageRank most efficient
Web masters' Point of view on PageRank
Google’s Point of view on PageRank
Effect on the web development industry

18. Thank you
dhara.gohil@gmail.com