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For professionals search engine optimization is becoming more and more challenging as constant changes take place in the way major search engine like Google, Yahoo and MSN index and rank the websites on the Net.

The way sub domains benefited in ranking and indexing would now change, it will not be considered as a separate site as most of the website owners presented it as on the Net and took advantage of a larger spread of keywords and more pages to rank on the search engines.

In Matt Cutts own words:

“Google is now treating sub domains much more like subdirectories of a domain ” in the sense that they wish to limit how many results show up for a given keyword search from a single site. In the past, some search marketers attempted to use keyworded sub domains as a method for improving search referral traffic from search engines…”

To read the full article click on the link below:

http://www.searchnewz.com/topstory/news/sn-2-20071213AdviceonSubdomainsvsSubdirectoriesforSEO.html

The changes in algorithms are taking place regularly as a process of evolution of the search engine technology in the cyber space. To algorithms are a closely guarded secret and an seo has to constantly keep tab of the changes taking place by constant analysis.