SEO (9) Overlap analysis

A study conducted by Dogpile.com in collaboration with the University of Pittsburg and Pennsylvania State University in April 2005 and July 2005 reveals that only 1.1% of 485,460 first page search results were the same across Google, Yahoo!, MSN Search and Ask Jeeves [8]. The study of search engine results for a given keyword over different search engines at the same time is termed as Overlap analysis and forms the basis of Meta search engines like Dogpile.com. Meta search engines send search queries to popular search engines and their results are displayed together on a single page. Since Google, Yahoo! Search and MSN Search are significant in terms of percent share of search queries answered, it is important to optimize the web pages to achieve top rankings in all three search engines.

1. Yahoo Search displayed “imageblowout.com” on the page# 1 of search results

2. MSN Search displayed “imageblowout.com” on the page# 2 of search results

3. Google displayed “imageblowout.com” on page# 55 of search results

The reason for the substantial difference in the ranking between Google search results and Yahoo! Search and MSN Search results is due to proprietary relevancy algorithms used by these search engines. Yahoo! Search and MSN Search use content based relevancy algorithms. The title tag of imageblowout.com is “Imageblowout – Free Image Library for Commercial Use”. This is an exact match to the keyword used to perform the search query, hence the higher rankings in Yahoo! Search and MSN Search.

source:SEARCH ENGINE OPTIMIZATION AND MARKETING by Binoy Varghese page 20-22

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