Why Add a Sitemap?

I'll be honest and say that I don't believe sitemaps improve your ranking in search engines. However, they do make sure more pages get indexed and that they get indexed more quickly. This article presents evidence that the difference is astounding:

• Google with a sitemap: 14 minutes
• Google without a sitemap: 1375 minutes
• Yahoo with a sitemap: 245 minutes
• Yahoo without a sitemap: 1773 minutes
  

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