Three compelling reasons to choose Subdomains over Subsites

1. Branding – each subsite has contextually different content - distinct products
2. The use of subsites increases relevance and hence the search ability of content with in the subsite.
3. Each subsite will eventually have it’s own full featured content and community

Examples of subdomains: (subdomain and separate domains are the same)

MONSTER.COM

http://www.monsterindia.com/
http://company.monsterindia.com/index.html
http://jobsearch.monsterindia.com/searchresult.html?loc=87

P&G

http://www.pgeverydaysolutions.com/pgeds/en_US/jsp/EDS_Page.jsp?pageID=HP
http://www.pg.com/en_US/index.shtml

YAHOO

http://cricket.yahoo.com/
http://in.yahoo.com/?p=us
http://www.yahoo.com/
http://new.music.yahoo.com/

GOOGLE

http://news.google.com
http://maps.google.com

References:

From the SEO GURU:

http://www.mattcutts.com/blog/subdomains-and-subdirectories/

http://www.googlelady.com/106/folders-vs-subdomains/
http://www.searchviews.com/index.php/archives/2008/07/seo-why-microsites-are-weakening-your-seo-results-%E2%80%93-dr-naveel-builds-your-immunity.php

Understanding Content Architecture to Google enable a site.

This is a very interesting area. Understanding the Site's content architecture to Google enable a site!!

The SUMMARY is:

1. Understand the various source of content
2. The amount of content available
3. Frequency of content update
   
4. The importance of the content
5. The relevance
6. What users can get from our Websites content?

I look forward to summarizing the same for Newspaper sites! and Especially for Drupal sites!!

Drupal in Newspapers

Drupal and SEO